ci: update ShellCheck action and checkout version

.forgejo/workflows/ci.yml

@@ -12,15 +12,7 @@ jobs:
   lint:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
-      - name: Install shellcheck
+      - name: Run ShellCheck
-        run: |
+        uses: ludeeus/action-shellcheck@master
-          wget https://github.com/koalaman/shellcheck/releases/latest/download/shellcheck-latest.linux.x86_64.tar.xz
-          tar -xvf shellcheck-latest.linux.x86_64.tar.xz
-          sudo mv shellcheck /usr/local/bin
-          rm shellcheck-latest.linux.x86_64.tar.xz
-
-      - name: Lint bash scripts
-        run: |
-          find . -type f -name "*.sh" -print0 | xargs -0 shellcheck