Upgrade CI actions to v5 for Node.js 24 support

Node.js 20 actions are deprecated and will be forced to Node.js 24
starting June 2026. Update actions/checkout and actions/setup-node
from v4 to v5.

Author: jumpbetweenrows

.github/workflows/cicd.yml

@@ -15,7 +15,7 @@ jobs:
     if: github.event_name == 'push'
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - name: Cache Rust dependencies
         uses: swatinem/rust-cache@v2
@@ -30,7 +30,7 @@ jobs:
         run: cargo test -p proxy
 
       - name: Set up Node
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v5
         with:
           node-version: 22
           cache: npm
@@ -54,7 +54,7 @@ jobs:
     outputs:
       version: ${{ steps.meta.outputs.version }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - name: Log in to GHCR
         uses: docker/login-action@v3
@@ -96,7 +96,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 5
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - name: Resolve version
         id: version