[Doc] Correct the comparision table for rex doc (opensearch-project#4321) (opensearch-project#4328)

* [Doc] Correct the comparision table for rex doc



* peng - remove non support feature from comparison table



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(cherry picked from commit 37f024d)

Signed-off-by: Jialiang Liang <jiallian@amazon.com>
Signed-off-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

Author: opensearch-trigger-bot[bot]

docs/user/ppl/cmd/rex.rst

@@ -211,7 +211,7 @@ Feature                        rex          parse
 ============================= ============ ============
 Pattern Type                   Java Regex   Java Regex
 Named Groups Required          Yes          Yes
-Filtering by Match             No           Yes  
+Multiple Named Groups          Yes          No
 Multiple Matches               Yes          No
 Text Substitution              Yes          No
 Offset Tracking                Yes          No