[Docs] Spelling fix in painless-getting-started.asciidoc
@@ -234,7 +234,7 @@ POST hockey/player/_update_by_query
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// CONSOLE
-Using the match operator (`==~`) you can update all the hockey players who's
+Using the match operator (`==~`) you can update all the hockey players whose
names start with a consonant and end with a vowel:
[source,js]
