License headers: s/Google/The Khronos Group

This was a copy-paste screwup, where the first line of the copyright had the company name was updated, but the company name mid way though was not.
diff --git a/BUILD.bazel b/BUILD.bazel
index ef1ef6a..7c97646 100644
--- a/BUILD.bazel
+++ b/BUILD.bazel
@@ -14,7 +14,7 @@
 #    disclaimer in the documentation and/or other materials provided
 #    with the distribution.
 #
-#    Neither the name of Google Inc. nor the names of its
+#    Neither the name of The Khronos Group Inc. nor the names of its
 #    contributors may be used to endorse or promote products derived
 #    from this software without specific prior written permission.
 #