chore(CODEOWNERS): add optimization team as code owner of abtesting and analytics specs (#5152)

Co-authored-by: Clément Vannicatte <[email protected]>

Author: leonardogavaudan

CODEOWNERS

@@ -6,5 +6,7 @@ website/ @algolia/doc-approvers
 specs/advanced-personalization @algolia/predict-fe
 specs/composition @algolia/composition
 specs/composition-full @algolia/composition
+specs/abtesting-v3 @algolia/optimization
+specs/analytics @algolia/optimization
 
 * @algolia/api-clients-automation