skia2/include/sksl/OWNERS

# In addition to include/ owners, the following reviewers can approve changes to SkSL public API:
brianosman@google.com
ethannicholas@google.com
johnstiles@google.com
Add Ethan and John to OWNERS for include/sksl/. Change-Id: I1bf6a41290eebd45e2065fcedf86ef2e20866f54 Reviewed-on: https://skia-review.googlesource.com/c/skia/+/534197 Auto-Submit: John Stiles <johnstiles@google.com> Reviewed-by: Brian Osman <brianosman@google.com> Commit-Queue: Brian Osman <brianosman@google.com> 2022-04-26 22:31:14 +00:00			`# In addition to include/ owners, the following reviewers can approve changes to SkSL public API:`
			`brianosman@google.com`
			`ethannicholas@google.com`
			`johnstiles@google.com`