Fix: install reviewdog binary via official installer (not pip)

Author: unknown

.github/workflows/pr-review.yml

@@ -24,7 +24,12 @@ jobs:
       - name: Install linters
         run: |
           python -m pip install --upgrade pip
-          pip install flake8 pylint bandit reviewdog
+          pip install flake8 pylint bandit
+
+      - name: Install reviewdog
+        run: |
+          # reviewdog is not a Python package; install the binary using the official installer
+          curl -sfL https://raw.githubusercontent.com/reviewdog/reviewdog/master/install.sh | sh -s -- -b /usr/local/bin v0.13.0
 
       - name: Determine changed Python files
         id: changes