workflows: Upgrade GitHub actions.

Signed-off-by: Anders Kaseorg <[email protected]>

Author: andersk

.github/workflows/zulip-ci.yml

@@ -56,12 +56,12 @@ jobs:
 
     steps:
       - name: "Check out python-zulip-api"
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           path: api
 
       - name: "Check out Zulip server ${{ matrix.server_version }}"
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           repository: zulip/zulip
           ref: ${{ matrix.server_version }}

.github/workflows/zulip-tests.yml

@@ -11,10 +11,10 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Set up Python 3.9
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: "3.9"
 
@@ -35,10 +35,10 @@ jobs:
         python-version: ["3.9", "3.10", "3.11", "3.12"]
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v6
         with:
           python-version: ${{ matrix.python-version }}
 
@@ -57,7 +57,7 @@ jobs:
           zulip-api-py3-venv\Scripts\Activate.ps1
           pytest --cov --cov-config=tools\.coveragerc --cov-report=xml
 
-      - uses: codecov/codecov-action@v4
+      - uses: codecov/codecov-action@v5
         with:
           files: coverage.xml
           token: ${{ secrets.CODECOV_TOKEN }}