chore(deps): bump actions/setup-dotnet from 5 to 6 (#9130)

Bumps [actions/setup-dotnet](https://github.com/actions/setup-dotnet) from 5 to 6.
- [Release notes](https://github.com/actions/setup-dotnet/releases)
- [Commits](actions/setup-dotnet@v5...v6)

---
updated-dependencies:
- dependency-name: actions/setup-dotnet
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/build.yml

@@ -182,7 +182,7 @@ jobs:
             17
             21
             25
-      - uses: actions/setup-dotnet@v5
+      - uses: actions/setup-dotnet@v6
         with:
           dotnet-version: '10.0.x'
        # Install and configure Rust & Cargo Lambda

.github/workflows/integration-tests.yml

@@ -172,7 +172,7 @@ jobs:
 
       - name: Install .NET 10 SDK
         if: contains(fromJSON('["build-x86-1", "build-x86-2", "build-arm64", "other-and-e2e", "cloud-based-tests", "tier1-finch", "tier1-windows-build-1", "tier1-windows-build-3", "tier1-windows-other"]'), matrix.test_suite)
-        uses: actions/setup-dotnet@v5
+        uses: actions/setup-dotnet@v6
         with:
           dotnet-version: '10.0.x'