Bump actions/setup-dotnet from 4 to 5 in /.github/actions/bootstrap (#1885)

Bumps [actions/setup-dotnet](https://github.com/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
...

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

Author: dependabot[bot]

.github/actions/bootstrap/action.yml

@@ -24,7 +24,7 @@ runs:
       run: |
         git config --global init.defaultBranch main
 
-    - uses: actions/setup-dotnet@v4
+    - uses: actions/setup-dotnet@v5
       with:
         global-json-file: global.json