Maybe fix lint CI by excluding example-runner

This will then not build example-shader and so then not require
spirv-val and friends.

Author: khyperia

Diff for: .github/workflows/ci.yaml

@@ -77,4 +77,4 @@ jobs:
       - uses: actions-rs/cargo@v1
         with:
           command: clippy
-          args: --workspace --all-targets -- -D warnings
+          args: --workspace --exclude example-runner --all-targets -- -D warnings