ci: pin setup-bats action to v1

Author: Kikolator

.github/workflows/lint.yml

@@ -22,7 +22,7 @@ jobs:
         run: shellcheck $(git ls-files '*.sh' '*.zsh')
 
       - name: Set up Bats
-        uses: mig4/setup-bats@v3
+        uses: mig4/setup-bats@v1
 
       - name: Run Bats tests
         run: bats test