MAINT: Update action version in GH workflow

Author: bashtage

.github/workflows/generate-documentation.yml

@@ -16,16 +16,16 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: [3.8]
+        python-version: [3.10]
     steps:
     - name: Checkout
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3
       with:
         fetch-depth: 0
     - name: Install pandoc
-      uses: r-lib/actions/setup-pandoc@v1
+      uses: r-lib/actions/setup-pandoc@v2
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@v3
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install dependencies