ci: bump actions off Node 20 (checkout v5, setup-node v6, upload-artifact v5)

Silences the Node 20 deprecation annotation. gitleaks-action stays at v2
(no v3 released yet).

Author: vekexasia

.github/workflows/ci.yml

@@ -10,7 +10,7 @@ jobs:
     name: Secret scanning
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           fetch-depth: 0
       - uses: gitleaks/gitleaks-action@v2
@@ -21,8 +21,8 @@ jobs:
     name: Backend tests
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-node@v4
+      - uses: actions/checkout@v5
+      - uses: actions/setup-node@v6
         with:
           node-version: '22'
           cache: npm
@@ -36,8 +36,8 @@ jobs:
     name: Frontend tests + build
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-node@v4
+      - uses: actions/checkout@v5
+      - uses: actions/setup-node@v6
         with:
           node-version: '22'
           cache: npm
@@ -55,8 +55,8 @@ jobs:
     name: E2E tests
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-node@v4
+      - uses: actions/checkout@v5
+      - uses: actions/setup-node@v6
         with:
           node-version: '22'
           cache: npm
@@ -108,7 +108,7 @@ jobs:
           NEXT_PUBLIC_DEFAULT_LOCALE: it
       - name: Upload Playwright report
         if: always()
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v5
         with:
           name: playwright-report
           path: web/playwright-report/
@@ -121,8 +121,8 @@ jobs:
     name: Demo frontend build
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-node@v4
+      - uses: actions/checkout@v5
+      - uses: actions/setup-node@v6
         with:
           node-version: '22'
           cache: npm
@@ -146,8 +146,8 @@ jobs:
       run:
         working-directory: web/workers/chat
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-node@v4
+      - uses: actions/checkout@v5
+      - uses: actions/setup-node@v6
         with:
           node-version: '22'
           cache: npm

.github/workflows/deploy-demo.yml

@@ -28,9 +28,9 @@ jobs:
     permissions:
       contents: read
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
-      - uses: actions/setup-node@v4
+      - uses: actions/setup-node@v6
         with:
           node-version: ${{ env.NODE_VERSION }}
           cache: npm