trying a proper cache key

.github/workflows/export-bom.yaml

@@ -123,7 +123,7 @@ jobs:
     - uses: actions/cache@v3
       with:
         path: pcb-images/  # Note that this path is not influenced by working-directory set in defaults, for example
-        key: 0042E1DE88
+        key: ${{ runner.os }}-build-${{ env.cache-name }}
 
   generate-bom:
     name: Generate BOM
@@ -214,7 +214,7 @@ jobs:
     - uses: actions/cache@v3
       with:
         path: pcb-images
-        key: 0042E1DE88
+        key: ${{ runner.os }}-build-${{ env.cache-name }}
 
     # - name: Download PCB Images
     #   if: github.event_name != 'release'