Rename cache key for SDKs to trigger rebuilding them on CI with the latest NDK 25b

Author: finagolfin

.github/workflows/sdks.yml

@@ -88,7 +88,7 @@ jobs:
         uses: actions/cache@v2
         with:
           path: ~/swift-${{ matrix.version }}-android-${{ matrix.arch }}-*-sdk.tar.xz
-          key: ${{ matrix.version }}-${{ steps.version.outputs.latest }}-${{ matrix.arch }}-new-sdk
+          key: ${{ matrix.version }}-${{ steps.version.outputs.latest }}-${{ matrix.arch }}-bump-sdk
       - name: Clone
         uses: actions/checkout@v2
         with: