ci(build-and-test-differential): add df -h (#26)

Signed-off-by: kminoda <koji.minoda@tier4.jp>

.github/workflows/build-and-test-differential.yaml

@@ -36,6 +36,10 @@ jobs:
         with:
           fetch-depth: 0
 
+      - name: Check disk space before build
+        run:
+          df -h
+
       - name: Remove exec_depend
         uses: autowarefoundation/autoware-github-actions/remove-exec-depend@v1
 
@@ -69,6 +73,10 @@ jobs:
           verbose: true
           flags: differential
 
+      - name: Check disk space after build
+        run:
+          df -h
+
   clang-tidy-differential:
     runs-on: ubuntu-latest
     container: ghcr.io/autowarefoundation/autoware-universe:humble-latest-cuda