chore: github actions should use versions from docs/requirements.txt while building docs (#5460)

Signed-off-by: Alexander Matyushentsev <AMatyushentsev@gmail.com>

.github/workflows/gh-pages.yaml

@@ -19,9 +19,8 @@ jobs:
           python-version: 3.x
       - name: build
         run: |
-          pip install mkdocs==1.0.4 mkdocs_material==4.1.1
+          pip install -r docs/requirements.txt
           mkdocs build
-          mkdir ./site/.circleci && echo '{version: 2, jobs: {build: {branches: {ignore: gh-pages}}}}' > ./site/.circleci/config.yml
       - name: deploy
         if: ${{ github.event_name == 'push' }}
         uses: peaceiris/actions-gh-pages@v2.5.0

docs/operator-manual/upgrading/1.8-1.9.md

@@ -2,7 +2,7 @@
 
 ## Environment variables expansion
 
-Argo CD supports using [environment variables](/user-guide/build-environment/) in
+Argo CD supports using [environment variables](../../../user-guide/build-environment/) in
 config management tools parameters. The expansion logic has been improved and now expands missing environment variables
 into an empty string.
 

docs/roadmap.md

@@ -60,8 +60,8 @@ The [GitOps Engine](https://github.com/argoproj/gitops-engine) is a library that
 A lot of Argo CD features are still not available in GitOps engine. The following features have to be contributed to the GitOps Engine:
 
 * an ability to customize resources health assessment and existing CRD health [assessment functions](https://github.com/argoproj/argo-cd/tree/master/resource_customizations).
-* resource diffing [customization](/user-guide/diffing/).
-* config management [tools](/user-guide/application_sources/) integration.
+* resource diffing [customization](../user-guide/diffing/).
+* config management [tools](../user-guide/application_sources/) integration.
 * unified syncing annotations [argoproj/gitops-engine#43](https://github.com/argoproj/gitops-engine/issues/43).
 
 ### GitOps Agent