Remove Materials Insiders usage. (#7430)

Signed-off-by: Steve Richards <srichards@mirantis.com>

.github/workflows/main.yml

@@ -57,7 +57,7 @@ jobs:
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
-          pip install git+https://${{ secrets.GH_TOKEN }}@github.com/lensapp/mkdocs-material-insiders.git
+          pip install mkdocs-material
           pip install mike
 
       - name: Checkout Release from lens

.github/workflows/mkdocs-delete-version.yml

@@ -18,7 +18,7 @@ jobs:
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
-          pip install git+https://${{ secrets.GH_TOKEN }}@github.com/lensapp/mkdocs-material-insiders.git
+          pip install mkdocs-material
           pip install mike
 
       - name: Checkout Release from lens

.github/workflows/mkdocs-manual.yml

@@ -21,7 +21,7 @@ jobs:
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
-          pip install git+https://${{ secrets.GH_TOKEN }}@github.com/lensapp/mkdocs-material-insiders.git
+          pip install mkdocs-material
           pip install mike
 
       - name: Checkout Version from lens

.github/workflows/mkdocs-set-default-version.yml

@@ -18,7 +18,7 @@ jobs:
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
-          pip install git+https://${{ secrets.GH_TOKEN }}@github.com/lensapp/mkdocs-material-insiders.git
+          pip install mkdocs-material
           pip install mike
 
       - name: Checkout Release from lens