CI hygiene: bump deprecated action versions

.github/actions/buildindex/action.yml

@@ -16,5 +16,5 @@ outputs:
     description: 'The time we greeted you'
 
 runs:
-  using: 'node16'
+  using: 'node20'
   main: 'index.js'

.github/workflows/BuildDocs.yml

@@ -51,14 +51,14 @@ jobs:
 
       # This repo
       - name: Checkout docs
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           path: main
           fetch-depth: 0
 
       # This repo's wiki (the Official docs wiki)
       - name: Checkout docs wiki repo
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           repository: delph-in/docs.wiki
           path: docswiki

.github/workflows/DailyDocBuildIfWikiUpdates.yml

@@ -62,7 +62,7 @@ jobs:
       # specified path, and overwrite the file created in the "Create cache file" step in the path
       - name: Check SHA
         id: check_sha
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: check-SHA
           key: check-SHA-${{ steps.head_sha.outputs.head_sha }}

.gitignore

@@ -1,6 +1,7 @@
 .idea/
 env/
 __pycache__/
+.claude/
 
 **/.DS_Store