fix syntax

blink1073 · blink1073 · commit 5234037babd3 · 2021-12-30T10:22:43.000-06:00
diff --git a/.github/workflows/downstream.yml b/.github/workflows/downstream.yml
@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: "3.9"
+        python-version: ["3.9"]
 
     steps:
       - name: Checkout
