Replace links to old WOPI docs with MS Learn links

[JJ-connect]

Motivation

Fixes #154

Checklist

• Code follows coding conventions held in this repo
• Automated tests have been added
• Tests are passing
• Docs have been updated (if applicable)
• Temporary settings (e.g. variables used during development and testing) have been reverted to defaults
• Adheres to .NET Design Guidelines

How to test

Follow new links to verify they lead to the correct page.

[petrsvihlik]

amazing job. thanks a lot @JJ-connect !

[codecov]

Codecov Report

Merging #155 (5ce6728) into master (29020d5) will increase coverage by 18.36%.
The diff coverage is 0.00%.

@@             Coverage Diff             @@
##           master     #155       +/-   ##
===========================================
+ Coverage        0   18.36%   +18.36%     
===========================================
  Files           0       47       +47     
  Lines           0     1013     +1013     
  Branches        0       80       +80     
===========================================
+ Hits            0      186      +186     
- Misses          0      824      +824     
- Partials        0        3        +3     

Impacted Files	Coverage Δ
.../WopiHost.Core/Controllers/ContainersController.cs	0.00% <ø> (ø)
...c/WopiHost.Core/Controllers/EcosystemController.cs	0.00% <ø> (ø)
src/WopiHost.Core/Controllers/FilesController.cs	0.00% <ø> (ø)
...ost.Core/Controllers/WopiBootstrapperController.cs	0.00% <ø> (ø)
src/WopiHost.Core/Extensions.cs	25.00% <ø> (ø)
src/WopiHost.Core/FileExtensions.cs	0.00% <ø> (ø)
src/WopiHost.Core/Models/BootstrapInfo.cs	0.00% <ø> (ø)
...WopiHost.Core/Models/BootstrapRootContainerInfo.cs	0.00% <ø> (ø)
src/WopiHost.Core/Models/CheckFileInfo.cs	0.00% <ø> (ø)
src/WopiHost.Core/Models/HostCapabilities.cs	0.00% <ø> (ø)
... and 51 more

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