update to latest versions of Github actions

Author: timgraham

.github/workflows/linters.yml

@@ -13,14 +13,14 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
       - name: Set up Python
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v6
         with:
           python-version: '3.12'
       - run: python -m pip install flake8
       - name: flake8
-        uses: liskin/gh-problem-matcher-wrap@v2
+        uses: liskin/gh-problem-matcher-wrap@v3
         with:
           linters: flake8
           run: flake8
@@ -29,9 +29,9 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
       - name: Set up Python
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v6
         with:
           python-version: '3.12'
       - run: python -m pip install isort

.github/workflows/tests.yml

@@ -61,8 +61,8 @@ jobs:
           #- crdb-version: LATEST
           #  use_server_side_binding: server_side_binding
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-python@v4
+      - uses: actions/checkout@v6
+      - uses: actions/setup-python@v6
         with:
           python-version: '3.12'
       - name: Install system packages for Django's Python test dependencies