ci: fix mkdocs requirements for gh-pages

Signed-off-by: Mirza Kopic <[email protected]>

Author: mirzakopic

.github/workflows/gh-pages.yaml

@@ -37,6 +37,6 @@ jobs:
           restore-keys: |
             mkdocs-material-
 
-      - run: pip install mkdocs-material mkdocs-macros-plugin mkdocs-awesome-pages-plugin mkdocs-static-i18n
+      - run: cd docs && pip install -r requirements.txt
 
       - run: cd docs && mkdocs gh-deploy --force