chore: upgrade python to 3.11 and some GHAs to the latest

There's a couple of unmaintained actions in use here. Replacing them
will require a closer look.

.github/workflows/ci.yml

@@ -6,11 +6,11 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v2
-    - name: Setup Python 3.7
-      uses: actions/setup-python@v1
+    - uses: actions/checkout@v4
+    - name: Setup Python 3.11
+      uses: actions/setup-python@v5
       with:
-        python-version: '3.7'
+        python-version: '3.11'
     - name: Install dependencies
       run: make deps-test
     - name: Lint
@@ -25,11 +25,11 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v2
-    - name: Setup Python 3.7
-      uses: actions/setup-python@v1
+    - uses: actions/checkout@v4
+    - name: Setup Python 3.11
+      uses: actions/setup-python@v5
       with:
-        python-version: '3.7'
+        python-version: '3.11'
     - name: Install packaging dependencies
       run: make deps-dist
     - id: package