ayufan: workflow: use CCACHE_DIR

Author: ayufan

.github/workflows/build.yaml

@@ -2,11 +2,12 @@ on: [push]
 
 env:
   RELEASE_START: 1150 # 1150, as this is latest build by GitLab CI
+  CCACHE_DIR: $RUNNER_TEMP/ccache
 
 jobs:
   build:
     runs-on: [self-hosted, Linux, ARM64]
-    container: ayufan/rock64-dockerfiles:bookworm
+    container: ayufan/rock64-dockerfiles:arm64
     steps:
     - name: Checkout
       uses: actions/checkout@v3
@@ -16,8 +17,6 @@ jobs:
         apt-get -y install docker.io
     - name: Set up QEMU
       uses: docker/setup-qemu-action@v2
-    - name: Configure ccache
-      run: echo "CCACHE_DIR=$RUNNER_TEMP/ccache" >> $GITHUB_ENV
     - name: Reset ccache statistics
       run: ccache -M 0 -F 0
     - name: Build package