Bump Microsoft.AspNetCore.SpaProxy from 8.0.19 to 8.0.20

---
updated-dependencies:
- dependency-name: Microsoft.AspNetCore.SpaProxy
  dependency-version: 8.0.20
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

src/Directory.Packages.props

@@ -24,7 +24,7 @@
     <PackageVersion Include="Microsoft.AspNetCore.Mvc.Core" Version="2.3.0" />
     <PackageVersion Include="Microsoft.AspNetCore.Mvc.Formatters.Json" Version="2.3.0" />
     <PackageVersion Include="Microsoft.AspNetCore.OpenApi" Version="8.0.19" />
-    <PackageVersion Include="Microsoft.AspNetCore.SpaProxy" Version="8.0.19" />
+    <PackageVersion Include="Microsoft.AspNetCore.SpaProxy" Version="8.0.20" />
     <PackageVersion Include="Microsoft.AspNetCore.SpaServices.Extensions" Version="8.0.0" />
     <PackageVersion Include="Microsoft.Extensions.Caching.Abstractions" Version="9.0.8" />
     <PackageVersion Include="Microsoft.Extensions.Caching.Memory" Version="9.0.8" />