Merge pull request riscv-collab#1265 from alexsifivetw/alexc/fix_yaml_format

Fix yaml format

Author: kito-cheng

.github/workflows/nightly-release.yaml

@@ -82,7 +82,7 @@ jobs:
           sudo make -j $(nproc) ${{ matrix.mode }}
 
       - name: build qemu
-        if: "${{ matrix.mode }}" == "linux"
+        if: ${{ matrix.mode }} == 'linux'
         run: |
           make -j$(nproc) build-sim SIM=qemu