Add myself as codeowner for the parser (#11013)

Author: dhruvmanila

.github/CODEOWNERS

@@ -5,11 +5,10 @@
 # - The '*' pattern is global owners.
 # - Order is important. The last matching pattern has the most precedence.
 
-# Jupyter
-/crates/ruff_linter/src/jupyter/ @dhruvmanila
+/crates/ruff_notebook/ @dhruvmanila
 /crates/ruff_formatter/ @MichaReiser
 /crates/ruff_python_formatter/ @MichaReiser
-/crates/ruff_python_parser/ @MichaReiser
+/crates/ruff_python_parser/ @MichaReiser @dhruvmanila
 
 # flake8-pyi
 /crates/ruff_linter/src/rules/flake8_pyi/ @AlexWaygood