Update generate_toc.yml

Author: sbryngelson

.github/workflows/generate_toc.yml

@@ -7,7 +7,7 @@ jobs:
   generateTOC:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v4
     - name: Generate TOC
       run: make deps generateTOC
     - name: Auto commit