chore(deps): update dependency orjson to v3.9.15 [security]

Author: renovate[bot]

api/social_media_fetcher/requirements.txt

@@ -39,7 +39,7 @@ schedule==1.2.0
 python-dateutil==2.8.2
 
 # JSON handling
-orjson==3.9.10
+orjson==3.9.15
 
 # Rate limiting
 slowapi==0.1.9