Bump Microsoft.CodeCoverage from 17.2.0 to 17.6.3

Bumps [Microsoft.CodeCoverage](https://github.com/microsoft/codecoverage) from 17.2.0 to 17.6.3.
- [Commits](https://github.com/microsoft/codecoverage/commits)

---
updated-dependencies:
- dependency-name: Microsoft.CodeCoverage
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

tests/PSDocs.Tests/PSDocs.Tests.csproj

@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
     <TargetFramework>netcoreapp3.1</TargetFramework>
@@ -10,7 +10,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.CodeCoverage" Version="17.2.0" />
+    <PackageReference Include="Microsoft.CodeCoverage" Version="17.6.3" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.2.0" />
     <PackageReference Include="Microsoft.PowerShell.SDK" Version="7.0.3" />
     <PackageReference Include="xunit" Version="2.4.2" />