features: fix listing for GL_ARB_parallel_shader_compile

this isn't actually all drivers

Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <!12909>
2 jobs for !12909 with feat in 3 minutes and 47 seconds (queued for 3 seconds)
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Status Name Job ID Coverage
  Sanity
passed sanity #13765790

00:00:10

 
  Deploy
passed test-docs-mr #13765792

00:03:37