Added support for RefToBuild

.github/workflows/build-webpages.yml

@@ -3,6 +3,12 @@ name: Build web-pages (Ubuntu-latest)
 on:
   workflow_dispatch:
     branches: [ main ]
+    inputs:
+      refToBuild:
+        description: 'Tag or commit SHA1 to build - must be on main'
+        default: ''
+        required: false
+        type: string
 
 # Sets permissions of the GITHUB_TOKEN to allow deployment to GitHub Pages
 permissions:
@@ -18,6 +24,8 @@ jobs:
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
+        with:
+          ref: ${{ inputs.refToBuild }}
 
       - name: Compile nroff tools
         run: |
@@ -29,7 +37,6 @@ jobs:
           export PATH=`pwd`/nroff/bin/linux:$PATH
           cd ./microemacs/doc
           make web_pages/me/index.html
-          unzip --help 
 
       - name: Build package store
         run: |