Bump Microsoft.CodeAnalysis.CSharp and System.Collections.Immutable

Bumps Microsoft.CodeAnalysis.CSharp from 4.14.0 to 5.3.0
Bumps System.Collections.Immutable from 9.0.0 to 9.0.14

---
updated-dependencies:
- dependency-name: Microsoft.CodeAnalysis.CSharp
  dependency-version: 5.3.0
  dependency-type: direct:production
  update-type: version-update:semver-major
- dependency-name: System.Collections.Immutable
  dependency-version: 9.0.14
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

GFramework.SourceGenerators.Common/GFramework.SourceGenerators.Common.csproj

@@ -21,7 +21,7 @@
             <PrivateAssets>all</PrivateAssets>
             <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
         </PackageReference>
-        <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="4.14.0" PrivateAssets="all"/>
+        <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="5.3.0" PrivateAssets="all"/>
         <PackageReference Update="Meziantou.Analyzer" Version="3.0.19">
             <PrivateAssets>all</PrivateAssets>
             <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
@@ -30,7 +30,7 @@
             <PrivateAssets>all</PrivateAssets>
             <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
         </PackageReference>
-        <PackageReference Include="System.Collections.Immutable" Version="9.0.0"/>
+        <PackageReference Include="System.Collections.Immutable" Version="9.0.14"/>
     </ItemGroup>
     <ItemGroup>
         <AdditionalFiles Include="AnalyzerReleases.Shipped.md"/>