Update GitHub Actions root project cache key

Author: boltronics

.github/workflows/ci.yml

@@ -29,7 +29,7 @@ jobs:
       with:
         path: ~/.cache/pip # This path is specific to Ubuntu
         # Check for a cache hit for the corresponding dev requirements file
-        key: ${{ runner.os }}-pip-${{ hashFiles('requirements.dev.txt') }}-${{ hashFiles('requirements.txt') }}
+        key: ${{ runner.os }}-pip-${{ hashFiles('requirements.txt') }}
         restore-keys: |
           ${{ runner.os }}-pip-
           ${{ runner.os }}-