Also bump cache on Windows

Author: josevalim

.github/workflows/ci.yml

@@ -86,7 +86,7 @@ jobs:
         id: mix-cache # id to use in retrieve action
         with:
           path: ${{ github.workspace }}\${{ matrix.working_directory }}\deps
-          key: ${{ runner.os }}-Elixir-v${{ matrix.elixir }}-OTP-${{ matrix.otp }}-${{ hashFiles(format('{0}\{1}\mix.lock', github.workspace, matrix.working_directory)) }}
+          key: ${{ runner.os }}-Elixir-v${{ matrix.elixir }}-OTP-${{ matrix.otp }}-${{ hashFiles(format('{0}\{1}\mix.lock', github.workspace, matrix.working_directory)) }}-v1
       - name: Install dependencies
         if: ${{ steps.mix-cache.outputs.cache-hit != 'true' }}
         run: mix deps.get