Change Qt version to something that exists

ogoffart · ogoffart · commit c42c2ccf0132 · 2021-04-20T09:40:54.000+02:00
Yeah, that means Qt 5.6 is out
diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
@@ -16,13 +16,11 @@ jobs:
     strategy:
       matrix:
         include:
-          - qt: '5.6.2'
-            rust: stable
           - qt: '5.15.2'
             rust: stable
-          - qt: '5.9.2'
+          - qt: '5.9.9'
             rust: beta
-          - qt: '5.12.2'
+          - qt: '5.12.9'
             rust: nightly
 
     steps:
