build(deps): bump github/issue-labeler from 2.5 to 2.6

Bumps [github/issue-labeler](https://github.com/github/issue-labeler) from 2.5 to 2.6.
- [Release notes](https://github.com/github/issue-labeler/releases)
- [Commits](https://github.com/github/issue-labeler/compare/v2.5...v2.6)

---
updated-dependencies:
- dependency-name: github/issue-labeler
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

.github/workflows/issues-opened.yml

@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v2
-    - uses: github/issue-labeler@v2.5
+    - uses: github/issue-labeler@v2.6
       with:
         repo-token: "${{ secrets.GITHUB_TOKEN }}"
         configuration-path: .github/labeler-issue-triage.yml