disable some workflows which need attention

Signed-off-by: David Young <davidy@funkypenguin.co.nz>

.github/workflows/on-push-master-update-leanpub-preview.yml

@@ -1,48 +0,0 @@
-name: Update leanpub branches
-
-on:
-  push:
-    branches:
-      - dev
-    paths:
-      - 'manuscript/*.md'
-      - 'manuscript/**/*.md'
-      - '.github/workflows/*'
-      - 'scripts/*'
-
-
-jobs:
-  update-leanpub:
-    name: update-leanpub
-    runs-on: ubuntu-latest
-    steps:
-    - name: Checkout charts repo
-      uses: actions/checkout@v2
-
-    - name: Checkout latest leanpub-preview branch
-      uses: actions/checkout@v2
-      with:    
-        repository: ${{ env.GITHUB_PAGES_REPO }}
-        ref: leanpub-preview  
-        path: leanpub-preview
-
-    - name: Replace contents of leanpub-preview branch
-      run: |
-        rm -rf leanpub-preview/manuscript
-        rm -rf leanpub-preview/scripts
-        cp -rf manuscript leanpub-preview/
-        cp -rf scripts leanpub-preview/
-        cd leanpub-preview
-        ./scripts/markdown-to-markua.sh
-        git config --local --unset-all "http.https://github.com/.extraheader"
-        git config --global user.email "autopenguin@funkypenguin.co.nz"
-        git config --global user.name "AutoPenguin"        
-        git add .
-        git commit -m 'Update for leanpub preview'        
-
-    - name: Push changes
-      uses: ad-m/github-push-action@master
-      with:
-        github_token: ${{ secrets.GITHUB_TOKEN }}
-        directory: leanpub-preview
-        branch: leanpub-preview