Update rootfs.yml

.github/workflows/rootfs.yml

@@ -92,7 +92,7 @@ jobs:
         path: ~/.buildroot-ccache
         key: ${{ inputs.submodule }}-musl-ccache-${{ github.sha }}
         restore-keys: |
-          ${{ inputs.submodule }}-musl-ccache-
+          ${{ inputs.submodule }}-musl-ccache-off
 
     - name: build
       #if: steps.cache.outputs.cache-hit != 'true'
@@ -112,4 +112,4 @@ jobs:
       with:
         name: SDK (musl)
         path: ${{ inputs.submodule || '.' }}/output/images/arm-miyoo-linux-musleabi_sdk-buildroot.tar.gz
-        if-no-files-found: error # 'error', 'warn', 'ignore'; defaults to `warn` 
+        if-no-files-found: error # 'error', 'warn', 'ignore'; defaults to `warn`