update cache keys to use matrix.os

Author: 0xbrayo

.github/workflows/build.yml

@@ -105,9 +105,9 @@ jobs:
         cache-name: node
       with:
         path: ${{ steps.npm-cache-dir.outputs.dir }}
-        key: ${{ runner.os }}-${{ env.cache-name }}-${{ hashFiles('**/package-lock.json') }}
+        key: ${{ matrix.os }}-${{ env.cache-name }}-${{ hashFiles('**/package-lock.json') }}
         restore-keys: |
-          ${{ runner.os }}-${{ env.cache-name }}-
+          ${{ matrix.os }}-${{ env.cache-name }}-
 
     - name: Cache cargo build
       uses: actions/cache@v4
@@ -117,9 +117,9 @@ jobs:
       with:
         path: aw-server-rust/target
         # key needs to contain rustc_hash due to https://github.com/ActivityWatch/aw-server-rust/issues/180
-        key: ${{ runner.os }}-${{ env.cache-name }}-${{ steps.toolchain.outputs.cachekey }}-${{ hashFiles('**/Cargo.lock') }}
+        key: ${{ matrix.os }}-${{ env.cache-name }}-${{ steps.toolchain.outputs.cachekey }}-${{ hashFiles('**/Cargo.lock') }}
         restore-keys: |
-          ${{ runner.os }}-${{ env.cache-name }}-${{ steps.toolchain.outputs.rustc_hash }}-
+          ${{ matrix.os }}-${{ env.cache-name }}-${{ steps.toolchain.outputs.rustc_hash }}-
 
     - name: Install APT dependencies
       if: runner.os == 'Linux'