Quote string?

Author: saethlin

.github/workflows/ci.yml

@@ -18,7 +18,7 @@ jobs:
     env:
       RUST_BACKTRACE: 1
       HOST_TARGET: ${{ matrix.host_target }}
-      MIRIFLAGS: -Zmiri-tag-gc=${{ matrix.os == ubuntu-latest }}
+      MIRIFLAGS: -Zmiri-tag-gc=${{ matrix.os == "ubuntu-latest" }}
     strategy:
       matrix:
         build: [linux64, macos, win32]