Bump impresscms-dev/phpdocs-wiki-update-action from 2.0.1 to 2.1

Bumps [impresscms-dev/phpdocs-wiki-update-action](https://github.com/impresscms-dev/phpdocs-wiki-update-action) from 2.0.1 to 2.1.
- [Release notes](https://github.com/impresscms-dev/phpdocs-wiki-update-action/releases)
- [Commits](impresscms-dev/phpdocs-wiki-update-action@v2.0.1...v2.1)

---
updated-dependencies:
- dependency-name: impresscms-dev/phpdocs-wiki-update-action
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

.github/workflows/update-wiki.yml

@@ -14,7 +14,7 @@ jobs:
       - name: Checkouting main code...
         uses: actions/checkout@v2
       - name: Updating Project Wiki...
-        uses: impresscms-dev/phpdocs-wiki-update-action@v2.0.1
+        uses: impresscms-dev/phpdocs-wiki-update-action@v2.1
         with:
           wiki_github_update_token: ${{secrets.WIKI_GITHUB_UPDATE_TOKEN}}
           wiki_github_update_user: ${{secrets.WIKI_GITHUB_UPDATE_USER}}