Fix broken CI yaml script. Ensure a default value exists for the os matrix key.

Ridwan Abdilahi · mbrubeck · commit e01054b1e610 · 2022-09-13T17:18:21.000-07:00
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
@@ -12,6 +12,7 @@ jobs:
     strategy:
       matrix:
         toolchain: ["stable", "beta", "nightly", "1.36.0"]
+        os: [ubuntu-latest]
         include:
           - toolchain: stable
             env:
