ci: drop sokol-d-nuklear-example-branch [wait merge]

.github/workflows/gen_bindings.yml

@@ -61,7 +61,6 @@ jobs:
       - uses: actions/checkout@main
         with:
           repository: kassane/sokol-d
-          ref: nuklear-example
           path: bindgen/sokol-d
       - uses: actions/checkout@main
         with:
@@ -323,6 +322,7 @@ jobs:
           dub build :instancingcompute
           dub build :mrt
           dub build :noninterleaved
+          dub build :nuklear
           dub build :offscreen
           dub build :quad
           dub build :shapes