actions: Update to latest versions of actions

Signed-off-by: Stephen Finucane <stephen@that.guru>

.github/workflows/ci.yaml

@@ -9,9 +9,9 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout source code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
       - name: Set up Python 3.10
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v4
         with:
           python-version: "3.10"
       - name: Install dependencies
@@ -26,12 +26,12 @@ jobs:
         python: ["3.7", "3.8", "3.9", "3.10"]
     steps:
       - name: Checkout source code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
         # We need history to build the package
         with:
           fetch-depth: 0
       - name: Set up Python ${{ matrix.python }}
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v4
         with:
           python-version: ${{ matrix.python }}
       - name: Install dependencies
@@ -44,20 +44,20 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout source code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
         # We need history for release notes
         with:
           fetch-depth: 0
       - name: Set up Python 3.10
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v4
         with:
           python-version: "3.10"
       - name: Install dependencies
         run: python -m pip install tox
       - name: Build docs (via tox)
         run: tox -e docs
       - name: Archive build results
-        uses: actions/upload-artifact@v2
+        uses: actions/upload-artifact@v3
         with:
           name: html-docs-build
           path: docs/_build/html
@@ -69,12 +69,12 @@ jobs:
     if: github.event_name == 'push'
     steps:
       - name: Checkout source code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
         # We need history to build the package
         with:
           fetch-depth: 0
       - name: Set up Python 3.10
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v4
         with:
           python-version: "3.10"
       - name: Install dependencies