Ensure git version info is available when building docs in CI

(also need to check on rtd!)

Author: jepler

.github/actions/deps/submodules/action.yml

@@ -22,7 +22,7 @@ inputs:
     - restore
 
   version:
-    description: 'Whether to generate CP version'
+    description: 'Whether to fetch tags to identify CP version'
     required: false
     default: false
     type: boolean

.github/workflows/build.yml

@@ -183,6 +183,8 @@ jobs:
         python-version: 3.x
     - name: Set up submodules
       uses: ./.github/actions/deps/submodules
+      with:
+        version: true
     - name: Install dependencies
       run: |
         sudo apt-get update