ci: update GitHub Actions workflows and dependencies

- Add workflow_dispatch trigger for manual runs
- Upgrade actions/checkout from v2 to v4
- Upgrade leafo/gh-actions-lua from v8 to v12
- Upgrade upload/download artifact actions from v2 to v4

Author: bytemain

.github/workflows/publish.yaml

@@ -3,6 +3,7 @@ name: generate and publish manifest
 on:
   push:
     tags: [ 'v*' ]
+  workflow_dispatch:
 
 permissions:
   contents: write
@@ -15,10 +16,10 @@ jobs:
         run: |
           echo "REPO_NAME=$(echo ${{ github.repository }} | cut -d'/' -f2)" >> $GITHUB_ENV
           echo "VERSION=$(echo ${{ github.ref }} | cut -d'/' -f3 | cut -c2-)" >> $GITHUB_ENV
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
 
       - name: Set up Lua
-        uses: leafo/gh-actions-lua@v8
+        uses: leafo/gh-actions-lua@v12
         with:
           luaVersion: '5.3.5'
 
@@ -37,7 +38,7 @@ jobs:
           print(str)' > manifest.json
           cat manifest.json
       - name: Upload JSON file
-        uses: actions/upload-artifact@v2
+        uses: actions/upload-artifact@v4
         with:
           name: manifest
           path: manifest.json
@@ -50,9 +51,9 @@ jobs:
           echo "REPO_NAME=$(echo ${{ github.repository }} | cut -d'/' -f2)" >> $GITHUB_ENV
           echo "VERSION=$(echo ${{ github.ref }} | cut -d'/' -f3 | cut -c2-)" >> $GITHUB_ENV
       - name: Checkout code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       - name: Download JSON file
-        uses: actions/download-artifact@v2
+        uses: actions/download-artifact@v4
         with:
           name: manifest
       - name: Compress build files