Bump some GitHub Actions workflows

.github/workflows/deploy-latest.yml

@@ -20,7 +20,7 @@ jobs:
       # gcloud commmand breaks on higher Python versions, so stick with 3.9:
       with:
         python-version: "3.9"
-    - uses: actions/cache@v3
+    - uses: actions/cache@v4
       name: Configure pip caching
       with:
         path: ~/.cache/pip

.github/workflows/prettier.yml

@@ -10,8 +10,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Check out repo
-      uses: actions/checkout@v2
-    - uses: actions/cache@v2
+      uses: actions/checkout@v4
+    - uses: actions/cache@v4
       name: Configure npm caching
       with:
         path: ~/.npm

.github/workflows/test-pyodide.yml

@@ -12,9 +12,9 @@ jobs:
   test:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Set up Python 3.10
-      uses: actions/setup-python@v3
+      uses: actions/setup-python@v5
       with:
         python-version: "3.10"
         cache: 'pip'