CI: use extra Action for testing documentation (#139)

.github/workflows/doc.yml

@@ -0,0 +1,38 @@
+name: Documentation
+
+on:
+  push:
+    branches: [ main, dev ]
+  pull_request:
+    branches: [ main, dev ]
+
+jobs:
+  build:
+
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ ubuntu-latest ]
+        python-version: [ '3.8' ]
+
+    steps:
+    - uses: actions/checkout@v3
+
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v4
+      with:
+        python-version: ${{ matrix.python-version }}
+
+    - name: Install package
+      run: |
+        python -m pip install --upgrade pip
+        pip install -r requirements.txt
+
+    - name: Install docs requirements
+      run: pip install -r docs/requirements.txt
+
+    - name: Test building documentation
+      run: python -m sphinx docs/ docs/_build/ -b html -W
+
+    - name: Check links in documentation
+      run: python -m sphinx docs/ docs/_build/ -b linkcheck -W

.github/workflows/test.yml

@@ -12,7 +12,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ ubuntu-20.04, windows-latest, macOS-latest ]
+        os: [ ubuntu-latest, windows-latest, macOS-latest ]
         python-version: [ '3.8' ]
         include:
           - os: ubuntu-latest
@@ -33,7 +33,6 @@ jobs:
         python -V
         python -m pip install --upgrade pip
         pip install -r requirements.txt
-        pip install -r docs/requirements.txt
         pip install -r tests/requirements.txt
 
     - name: Test with pytest
@@ -48,10 +47,4 @@ jobs:
       with:
         token: ${{ secrets.CODECOV_TOKEN }}
         file: ./coverage.xml
-      if: matrix.os == 'ubuntu-20.04'
-
-    - name: Test building documentation
-      run: |
-        python -m sphinx docs/ docs/_build/ -b html -W
-        python -m sphinx docs/ build/sphinx/html -b linkcheck
-      if: matrix.os == 'ubuntu-20.04'
+      if: matrix.os == 'ubuntu-latest'