Remove invalid URL and exclude some URLs

Apparently the action does not work with URls pointing at content.
See also:

- urlstechie/urlchecker-action#105

.github/workflows/docs-url-check.yaml

@@ -44,3 +44,4 @@ jobs:
           subfolder: docs
           file_types: .md
           exclude_files: docs/README.md
+          exclude_urls: https://code.visualstudio.com/shortcuts/keyboard-shortcuts-windows.pdf,https://github.com/FAForever/fa/deployments

docs/development-start-here/lua-setup.md

@@ -62,7 +62,7 @@ For Linux users you can use the following bash script file instead:
 ```bash
 #! /bin/sh
 
-# Change this to the location of your run proton run script (you will have copied this into your client folder https://wiki.faforever.com/en/FAQ/Client-Setup)
+# Change this to the location of your run proton run script
 RunProton="$HOME/Applications/FAF/downlords-faf-client-1.6.0/run"
 $RunProton $HOME/.faforever/bin/ForgedAlliance.exe /init init_dev.lua /showlog /log "dev.log" /EnableDiskWatch /nomovie