Bump Octokit from 11.0.1 to 12.0.0 (#319)

Bumps [Octokit](https://github.com/octokit/octokit.net) from 11.0.1 to 12.0.0.
- [Release notes](https://github.com/octokit/octokit.net/releases)
- [Changelog](https://github.com/octokit/octokit.net/blob/main/docs/releases.md)
- [Commits](octokit/octokit.net@v11.0.1...v12.0.0)

---
updated-dependencies:
- dependency-name: Octokit
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

src/SimpleAccounting/SimpleAccounting.csproj

@@ -30,7 +30,7 @@
     <!-- license is MIT -->
     <PackageReference Include="MagicFileEncoding" Version="3.0.0"/>
     <!-- license is MIT -->
-    <PackageReference Include="Octokit" Version="11.0.1"/>
+    <PackageReference Include="Octokit" Version="12.0.0"/>
   </ItemGroup>
 
   <ItemGroup>