docs: update workflows

(cherry picked from commit 8dea9e2)

Author: dgarcia360

.github/workflows/docs-pages.yaml

@@ -26,7 +26,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v3
         with:
-          python-version: 3.7
+          python-version: 3.9
       - name: Set up JDK 1.8
         uses: actions/setup-java@v1
         with:

.github/workflows/docs-pr.yaml

@@ -25,7 +25,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v3
         with:
-          python-version: 3.7
+          python-version: 3.9
       - name: Set up JDK 1.8
         uses: actions/setup-java@v1
         with: