Fix action version in check.yml

Author: rffontenelle

.github/workflows/check.yml

@@ -52,7 +52,7 @@ jobs:
         run: git pull --rebase
 
       - name: Add problem matcher
-        uses: sphinx-doc/github-problem-matcher@v1
+        uses: sphinx-doc/github-problem-matcher@v1.0.0
 
       - name: Build docs
         continue-on-error: true