chore(ci): Upgrade GitHub Actions versions in release workflows

This updates `actions/checkout`, `actions/setup-python`, and `astral-sh/setup-uv` to their latest major versions in the release-related GitHub Actions workflows.

Co-authored-by: Liang Wu <wuliang@google.com>
PiperOrigin-RevId: 933935472

Author: wuliang229

.github/workflows/release-publish.yml

@@ -31,12 +31,12 @@ jobs:
       - uses: actions/checkout@v6
 
       - name: Install uv
-        uses: astral-sh/setup-uv@v4
+        uses: astral-sh/setup-uv@v7
         with:
           version: "latest"
 
       - name: Set up Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: "3.11"
 

.github/workflows/release-update-adk-web.yaml

@@ -21,7 +21,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
 
     - name: Fetch and unzip frontend assets
       run: |

.github/workflows/release-v1-publish.yml

@@ -41,12 +41,12 @@ jobs:
           echo "PEP 440 version: $PEP440"
 
       - name: Install uv
-        uses: astral-sh/setup-uv@v4
+        uses: astral-sh/setup-uv@v7
         with:
           version: "latest"
 
       - name: Set up Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: "3.11"