build(deps): bump gitleaks/gitleaks-action from 2 to 3

Bumps [gitleaks/gitleaks-action](https://github.com/gitleaks/gitleaks-action) from 2 to 3.
- [Release notes](https://github.com/gitleaks/gitleaks-action/releases)
- [Commits](gitleaks/gitleaks-action@v2...v3)

---
updated-dependencies:
- dependency-name: gitleaks/gitleaks-action
  dependency-version: '3'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/security-testing.yml

@@ -231,7 +231,7 @@ jobs:
           fetch-depth: 0
 
       - name: Run Gitleaks
-        uses: gitleaks/gitleaks-action@v2
+        uses: gitleaks/gitleaks-action@v3
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           GITLEAKS_LICENSE: ${{ secrets.GITLEAKS_LICENSE }}