Bump actions/setup-dotnet from 4 to 5 in the github-actions group

Bumps the github-actions group with 1 update: [actions/setup-dotnet](https://github.com/actions/setup-dotnet).


Updates `actions/setup-dotnet` from 4 to 5
- [Release notes](https://github.com/actions/setup-dotnet/releases)
- [Commits](actions/setup-dotnet@v4...v5)

---
updated-dependencies:
- dependency-name: actions/setup-dotnet
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: github-actions
...

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

Author: dependabot[bot]

.github/workflows/update-cloudflare-proxies.yml

@@ -14,7 +14,7 @@ jobs:
         with:
           ref: ${{ github.ref }}
 
-      - uses: actions/setup-dotnet@v4
+      - uses: actions/setup-dotnet@v5
 
       - name: Build to regenerate Cloudflare IPs
         run: dotnet build Common/Common.csproj