apply fix to [docs] action

.github/workflows/main_rcpch-nhs-organisations.yml

@@ -13,7 +13,7 @@ on:
 
 jobs:
   build-and-deploy:
-    if: github.event.pull_request.merged == true
+    if: github.event.pull_request.merged == true && !contains(github.event.pull_request.title, '[docs]')
     runs-on: ubuntu-latest
 
     steps:
@@ -37,7 +37,7 @@ jobs:
           package: "."
 
   deploy-mkdocs:
-    if: github.event.pull_request.merged == true
+    if: github.event.pull_request.merged == true && !contains(github.event.pull_request.title, '[docs]')
     runs-on: ubuntu-latest
     needs: build-and-deploy
 
@@ -76,7 +76,7 @@ jobs:
 
       - name: Install MkDocs and dependencies
         run: |
-          pip install mkdocs mkdocs-material
+          pip install mkdocs mkdocs-material mkdocs-git-committers-plugin-2 mkdocs-git-revision-date-localized-plugin mkdocs-macros-plugin mkdocs-with-pdf
 
       - name: Build MkDocs site
         run: mkdocs build --config-file documentation/mkdocs.yml