Bump github/issue-metrics from 2 to 3

Bumps [github/issue-metrics](https://github.com/github/issue-metrics) from 2 to 3.
- [Release notes](https://github.com/github/issue-metrics/releases)
- [Commits](https://github.com/github/issue-metrics/compare/v2...v3)

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

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

.github/workflows/issue-metrics.yml

@@ -27,7 +27,7 @@ jobs:
         echo "last_month=$first_day..$last_day" >> "$GITHUB_ENV"
 
     - name: Run issue-metrics tool
-      uses: github/issue-metrics@v2
+      uses: github/issue-metrics@v3
       env:
         GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         SEARCH_QUERY: 'repo:crytic/slither is:issue created:${{ env.last_month }} -reason:"not planned" -reason:"duplicate"'