update checkout and auto commit actions to latest versions

Author: nielsvaneck

.github/workflows/render-md-mermaid.yml

@@ -8,13 +8,13 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4.1.1
 
       - name: Render images for every Mermaid diagram in all Markdown files (*.md) in the repo.
         uses: ./
 
       - name: Commit rendered png and svg files
-        uses: stefanzweifel/git-auto-commit-action@v4
+        uses: stefanzweifel/git-auto-commit-action@v5.0.0
         with:
           file_pattern: "*[.svg,.png]"
           commit_message: automatically rendered mermaid diagrams