Fix category headings

Signed-off-by: Nathan Rew <nrew225@gmail.com>

README.md

@@ -723,13 +723,13 @@ _RSS/Atom automation_
 
 _Some [Groupware](#groupware) solutions also feature file sharing and synchronization._
 
-#### Distributed filesystems
+### Distributed filesystems
 
 **[`^        back to top        ^`](#)**
 
 _See https://github.com/awesome-foss/awesome-sysadmin#distributed-filesystems_
 
-#### File transfer/synchronization
+### File transfer/synchronization
 
 - [Git Annex](https://git-annex.branchable.com/) - File synchronization between computers, servers, external drives. ([Source Code](https://git.joeyh.name/index.cgi/git-annex.git/)) `GPL-3.0` `Haskell`
 - [Kinto](https://kinto.readthedocs.org) - Kinto is a minimalist JSON storage service with synchronisation and sharing abilities. ([Source Code](https://github.com/Kinto)) `Apache-2.0` `Python`
@@ -746,7 +746,7 @@ _See https://github.com/awesome-foss/awesome-sysadmin#distributed-filesystems_
 - [Unison](https://www.cis.upenn.edu/~bcpierce/unison/) - Unison is a file-synchronization tool for OSX, Unix, and Windows. `GPL-3.0` `OCaml`
 - [Z-Push](http://z-push.org/) - Implementation of Microsoft’s ActiveSync protocol. ([Source Code](https://stash.kopano.io/projects/ZHUB/repos/z-push)) `AGPL-3.0` `PHP`
 
-#### Peer-to-peer filesharing
+### Peer-to-peer filesharing
 
 - [bittorrent-tracker](https://webtorrent.io/) - Simple, robust, BitTorrent tracker (client and server) implementation. ([Source Code](https://github.com/feross/bittorrent-tracker)) `MIT` `Nodejs`
 - [cloud-torrent](https://github.com/jpillora/cloud-torrent) - Torrent Web Client with HTTP retrievable or streamable downloaded files. `AGPL-3.0` `Go`
@@ -763,14 +763,14 @@ _See https://github.com/awesome-foss/awesome-sysadmin#distributed-filesystems_
 - [Torrents.csv](https://gitlab.com/dessalines/torrents.csv) - A self-hostable torrent search engine. `GPL-3.0` `Rust`
 - [Transmission](https://transmissionbt.com/) - Fast, easy, Free Bittorrent client. ([Source Code](https://github.com/transmission/transmission)) `GPL-3.0` `C`
 
-#### Object storage/file servers
+### Object storage/file servers
 
 - [Minio](https://minio.io/) - Minio is an open source object storage server compatible with Amazon S3 APIs. ([Source Code](https://github.com/minio/minio)) `Apache-2.0` `Go`
 - [SeaweedFS](https://github.com/chrislusf/seaweedfs) - SeaweedFS is an open source distributed file system supporting WebDAV, S3 API, FUSE mount, HDFS, etc, optimized for lots of small files, and easy to add capacity. `Apache-2.0` `Go`
 - [SFTPGo](https://github.com/drakkan/sftpgo) - Flexible, fully featured and highly configurable SFTP server with optional FTP/S and WebDAV support. `AGPL-3.0` `Go`
 - [Zenko CloudServer](https://www.zenko.io/cloudserver) - Zenko CloudServer, an open-source Node.js implementation of a server handling the Amazon S3 protocol. ([Source Code](https://github.com/scality/S3)) `Apache-2.0` `Nodejs`
 
-#### Single-click/drag-n-drop upload
+### Single-click/drag-n-drop upload
 
 - [BoZoN](https://github.com/broncowdd/BoZoN) - Minimalist Drag and drop file sharing app. `AGPL-3.0` `PHP`
 - [Chibisafe](https://lolisafe.moe/) - Blazing fast file uploader and awesome bunker written in node. ([Source Code](https://github.com/weebdev/chibisafe)) `MIT` `Nodejs`
@@ -805,12 +805,12 @@ _See https://github.com/awesome-foss/awesome-sysadmin#distributed-filesystems_
 - [YouTransfer](http://www.youtransfer.io) - YouTransfer is a simple but elegant self-hosted file transfer and sharing solution. ([Source Code](https://github.com/remie/YouTransfer)) `Apache-2.0` `Nodejs`
 - [Zipline](https://zipline.diced.me/) - A lightweight, fast and reliable file sharing server that is commonly used with ShareX, offering a react-based Web UI and fast API. ([Source Code](https://github.com/diced/zipline)) `MIT` `Nodejs`
 
-#### Command-line file upload
+### Command-line file upload
 
 - [Beauties](https://github.com/dsx/beauties) - Minimalist file sharing written in Go, to be used primarily from Unix shell (e.g. with curl). Can be built as a Debian package for easy install. `MIT` `Go`
 - [transfer.sh](https://transfer.sh) - Easy file sharing from the command line. ([Source Code](https://github.com/dutchcoders/transfer.sh)) `MIT` `Go`
 
-#### Web based file managers
+### Web based file managers
 
 - [Apaxy](https://oupala.github.io/apaxy/) - Theme built to enhance the experience of browsing web directories, using the mod_autoindex Apache module and some CSS to override the default style of a directory listing. ([Source Code](https://github.com/AdamWhitcroft/Apaxy)) `Unlicense` `HTML`
 - [DirectoryLister](http://www.directorylister.com/) - Simple PHP based directory lister that lists a directory and all its sub-directories and allows you to navigate there within. ([Source Code](https://github.com/DirectoryLister/DirectoryLister)) `MIT` `PHP`