build(deps): bump reg-viz/reg-actions from 2 to 3

Bumps [reg-viz/reg-actions](https://github.com/reg-viz/reg-actions) from 2 to 3.
- [Commits](reg-viz/reg-actions@v2...v3)

---
updated-dependencies:
- dependency-name: reg-viz/reg-actions
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/storybook-diff.yml

@@ -20,7 +20,7 @@ jobs:
           npx storycap http://localhost:6006 --serverCmd "npx -p @angular/cli
           ng run capellacollab:storybook" --flat
         working-directory: ./frontend
-      - uses: reg-viz/reg-actions@v2
+      - uses: reg-viz/reg-actions@v3
         with:
           github-token: '${{ secrets.GITHUB_TOKEN }}'
           image-directory-path: './frontend/__screenshots__'