Lock the Psalm version used with GitHub Actions

Author: morozov

.github/workflows/static-analysis.yml

@@ -59,4 +59,4 @@ jobs:
         uses: actions/checkout@v2
 
       - name: Psalm
-        uses: docker://vimeo/psalm-github-actions
+        uses: docker://vimeo/psalm-github-actions:3.17.2