Update build-docs.yaml

.github/workflows/build-docs.yaml

@@ -23,6 +23,14 @@ jobs:
 
     # Steps represent a sequence of tasks that will be executed as part of the job
     steps:
+      - name: Cache PIP
+        uses: actions/cache@v3
+        with:
+          path: ~/.cache/pip
+          key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements.txt') }}
+          restore-keys: |
+            ${{ runner.os }}-pip-
+          
       # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
       - uses: actions/checkout@v2
         with:
@@ -32,6 +40,7 @@ jobs:
           pip install --upgrade pip && pip install mkdocs mkdocs-gen-files mkdocs-awesome-pages-plugin mkdocs-material
           git config user.name 'github-actions[bot]'
           git config user.email 'github-actions[bot]@users.noreply.github.com'
-      - name: Publish docs
+          
+      - name: Store docs in gh-pages branch
         run: |
           mkdocs gh-deploy