Bump Microsoft.AspNetCore.SpaProxy from 8.0.20 to 8.0.21 (#100)

---
updated-dependencies:
- dependency-name: Microsoft.AspNetCore.SpaProxy
  dependency-version: 8.0.21
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

NoteApp/NoteApp.csproj

@@ -14,7 +14,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.AspNetCore.SpaProxy" Version="8.0.20" />
+    <PackageReference Include="Microsoft.AspNetCore.SpaProxy" Version="8.0.21" />
     <PackageReference Include="MongoDB.Driver" Version="3.5.0" />
   </ItemGroup>