fix: set correct cache key for the docker step

Author: kristof-mattei

.github/workflows/build.yml

@@ -459,7 +459,7 @@ jobs:
           path: |
             ~/.cargo
             ./target
-          key: ${{ runner.os }}-${{ runner.arch }}-build-${{ env.CACHE_NAME }}-${{ hashFiles('Cargo.lock') }}-test
+          key: ${{ runner.os }}-${{ runner.arch }}-build-${{ env.CACHE_NAME }}-${{ hashFiles('Cargo.lock') }}-docker
           restore-keys: |
             ${{ runner.os }}-${{ runner.arch }}-build-${{ env.CACHE_NAME }}-${{ hashFiles('Cargo.lock') }}-
             ${{ runner.os }}-${{ runner.arch }}-build-${{ env.CACHE_NAME }}-