Bump cache

Author: jimhester

.github/workflows/R-CMD-check.yaml

@@ -51,8 +51,8 @@ jobs:
         uses: actions/cache@v1
         with:
           path: ${{ env.R_LIBS_USER }}
-          key: ${{ runner.os }}-r-${{ matrix.config.r }}-${{ hashFiles('depends.Rds') }}
-          restore-keys: ${{ runner.os }}-r-${{ matrix.config.r }}-
+          key: ${{ runner.os }}-r-${{ matrix.config.r }}-2-${{ hashFiles('depends.Rds') }}
+          restore-keys: ${{ runner.os }}-r-${{ matrix.config.r }}-2-
 
       - name: Install system dependencies
         if: runner.os == 'Linux'