ci(actions): Update workflow setup actions

Bump GitHub Actions checkout, setup-node, and setup-python to
Node 24-compatible major versions across the maintained workflows.
This removes the runner deprecation warning without changing the
workflow logic itself.

.github/workflows/ci.yml

@@ -22,12 +22,12 @@ jobs:
       has_quality_checklist: ${{ steps.intake.outputs.has_quality_checklist }}
       has_issue_link: ${{ steps.intake.outputs.has_issue_link }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           fetch-depth: 0
 
       - name: Set up Node
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v5
         with:
           node-version: "lts/*"
 
@@ -67,12 +67,12 @@ jobs:
     runs-on: ubuntu-latest
     needs: pr-policy
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           fetch-depth: 0
 
       - name: Set up Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: "3.10"
 
@@ -80,7 +80,7 @@ jobs:
         run: pip install -r tools/requirements.txt
 
       - name: Set up Node
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v5
         with:
           node-version: "lts/*"
 
@@ -134,10 +134,10 @@ jobs:
     runs-on: ubuntu-latest
     needs: [pr-policy, source-validation]
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - name: Set up Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: "3.10"
 
@@ -145,7 +145,7 @@ jobs:
         run: pip install -r tools/requirements.txt
 
       - name: Set up Node
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v5
         with:
           node-version: "lts/*"
 
@@ -200,12 +200,12 @@ jobs:
     env:
       GH_TOKEN: ${{ github.token }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           fetch-depth: 0
 
       - name: Set up Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: "3.10"
 
@@ -213,7 +213,7 @@ jobs:
         run: pip install -r tools/requirements.txt
 
       - name: Set up Node
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v5
         with:
           node-version: "lts/*"