update CI: timeout 6min

Author: chyyuu-tsinghua-cs

.github/workflows/test-run.yml

@@ -86,7 +86,7 @@ jobs:
     - name: Test ${{ matrix.arch }}
       working-directory: ${{ env.WORKING_DIRECTORY }}
       run: cd os && (PATH=$PATH:~/.cargo/bin timeout 240 make ARCH=${{ matrix.arch }} run TEST=1 2>&1 | tee output.log) || echo "qemu exited！"
-      timeout-minutes: 4
+      timeout-minutes: 6
     - name: check Testing output log
       working-directory: ${{ env.WORKING_DIRECTORY }}
       run: grep "Usertests passed!" os/output.log