Docs: Update query-string-query.asciidoc

Update sample

Closes #8024

docs/reference/query-dsl/queries/query-string-query.asciidoc

@@ -121,7 +121,7 @@ matches the same words as
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 {
     "query_string": {
-      "query": "(content:this OR content:thus) AND (name:this OR name:thus)"
+      "query": "(content:this OR content:that) AND (name:this OR name:that)"
     }
 }
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