Update all deprecated GitHub Actions to latest versions

- Update actions/upload-artifact@v3 → v4 (2 instances)
- Update actions/download-artifact@v3 → v4 (2 instances)
- Update actions/setup-node@v2 → v4 (2 instances)
- Update actions/checkout@v2 → v4 (1 instance)

This resolves deprecation warnings and prevents workflow failures:
- 'actions/download-artifact: v3' deprecation error
- Future-proofs workflows against other deprecated versions

Files updated:
- deploy-preview.yml: artifact actions v3→v4
- deploy-live.yml: artifact actions v3→v4
- release-beta.yaml: setup-node v2→v4
- release.yaml: setup-node v2→v4
- combine-dependabot-prs.yml: checkout v2→v4

Author: 45huto5h

.github/workflows/combine-dependabot-prs.yml

@@ -89,7 +89,7 @@ jobs:
             console.log('Combined: ' + combined);
             return combined
 
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 0
 

.github/workflows/deploy-live.yml

@@ -29,7 +29,7 @@ jobs:
       - name: Build site
         run: yarn build-demo && zip -r build.zip demo/build
 
-      - uses: actions/upload-artifact@v3
+      - uses: actions/upload-artifact@v4
         with:
           name: build
           path: build.zip
@@ -49,7 +49,7 @@ jobs:
           node-version: "18"
           cache: "yarn"
 
-      - uses: actions/download-artifact@v3
+      - uses: actions/download-artifact@v4
         with:
           name: build
 

.github/workflows/deploy-preview.yml

@@ -108,7 +108,7 @@ jobs:
       - name: Build site
         run: yarn build-demo && zip -r build.zip demo/build
 
-      - uses: actions/upload-artifact@v3
+      - uses: actions/upload-artifact@v4
         with:
           name: build
           path: build.zip
@@ -129,7 +129,7 @@ jobs:
           node-version: "18"
           cache: "yarn"
 
-      - uses: actions/download-artifact@v3
+      - uses: actions/download-artifact@v4
         with:
           name: build
 

.github/workflows/release-beta.yaml

@@ -20,7 +20,7 @@ jobs:
       - run: |
           git config user.name "github-actions[bot]"
           git config user.email "github-actions[bot]@users.noreply.github.com"
-      - uses: actions/setup-node@v2
+      - uses: actions/setup-node@v4
         with:
           node-version: "*"
           registry-url: "https://registry.npmjs.org"

.github/workflows/release.yaml

@@ -20,7 +20,7 @@ jobs:
       - run: |
           git config user.name "github-actions[bot]"
           git config user.email "github-actions[bot]@users.noreply.github.com"
-      - uses: actions/setup-node@v2
+      - uses: actions/setup-node@v4
         with:
           node-version: "*"
           registry-url: "https://registry.npmjs.org"