ci: drop testing for 0.8.0

Author: Firestar99

.github/workflows/push.yaml

@@ -52,8 +52,10 @@ jobs:
           #    """
           # It's probably easily fixable. But also `0.7.0` was released in April 2023, so there's
           # unlikely many users of it?
-          - rust-gpu-version: 0.8.0
-            glam-version: 0.24.2
+
+          # 0.8.0 started failing as well due to `zmij v1.0.20` requiring rustc 1.71 or newer
+#          - rust-gpu-version: 0.8.0
+#            glam-version: 0.24.2
           - rust-gpu-version: 0.9.0
             glam-version: 0.24.2