chore(CODEOWNERS): add composition team as code owner of API client specs

Author: ClaraMuller

CODEOWNERS

@@ -4,5 +4,7 @@
 specs/ @algolia/doc-approvers
 website/ @algolia/doc-approvers
 specs/advanced-personalization @algolia/predict-fe
+specs/composition @algolia/composition
+specs/composition-full @algolia/composition
 
 * @algolia/api-clients-automation