[NRL-774] Remove fallbacks for ASDF caches

Author: mattdean3-nhs

.github/workflows/persistent-environment.yml

@@ -35,8 +35,7 @@ jobs:
         with:
           path: ~/.asdf
           key: ${{ runner.os }}-asdf-${{ hashFiles('**/.tool-versions') }}
-          restore-keys: |
-            ${{ runner.os }}-asdf-
+          fail-on-cache-miss: false
 
       - name: Install asdf
         uses: asdf-vm/actions/[email protected]