Bump Nullable.Extended.Analyzer from 1.10.4539 to 1.15.6581

---
updated-dependencies:
- dependency-name: Nullable.Extended.Analyzer
  dependency-version: 1.15.6581
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Netch/Netch.csproj

@@ -53,7 +53,7 @@
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
-    <PackageReference Include="Nullable.Extended.Analyzer" Version="1.10.4539">
+    <PackageReference Include="Nullable.Extended.Analyzer" Version="1.15.6581">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>