update cache key to include arch

Author: hatemhelal

.github/workflows/ci.yml

@@ -44,9 +44,9 @@ jobs:
       with:
         path: |
           ~/.ccache
-        key: ${{ runner.os }}-${{ matrix.compiler }}-${{ matrix.build_type }}-${{ matrix.simd }}-${{ hashFiles('**/CMakeLists.txt') }}
+        key: ${{ runner.os }}-${{ runner.arch }}-${{ matrix.compiler }}-${{ matrix.build_type }}-${{ matrix.simd }}-${{ hashFiles('**/CMakeLists.txt') }}
         restore-keys: |
-          ${{ runner.os }}-${{ matrix.compiler }}-${{ matrix.build_type }}-${{ matrix.simd }}
+          ${{ runner.os }}-${{ runner.arch }}-${{ matrix.compiler }}-${{ matrix.build_type }}-${{ matrix.simd }}
 
     - name: Set compiler
       run: |