assign fricklerhandwerk for documentation releated PRs

.github/assign-by-files.yml

@@ -0,0 +1,5 @@
+---
+# This files is used by https://github.com/marketplace/actions/auto-assign-reviewer-by-files
+# to assign maintainers
+"doc/**/*":
+  - fricklerhandwerk

.github/workflows/assign-reviewer.yml

@@ -0,0 +1,12 @@
+name: "Auto Assign"
+on:
+  - pull_request
+
+jobs:
+  assign_reviewer:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: shufo/auto-assign-reviewer-by-files@v1.1.4
+        with:
+          config: ".github/assign-by-files.yml"
+          token: ${{ secrets.GITHUB_TOKEN }}