Fix synonym exercise

Author: erikhatcher

docs/40_Analysis/9_advanced.mdx

@@ -1,7 +1,7 @@
 # 🦹 Advanced
 
 ## Synonyms
-<Playground url="https://search-playground.corp.mongodb.com/tools/code-sandbox/snapshots/67b588c6828ad15116bccda5">🔗 TODO: synonyms</Playground>
+<Playground url="https://search-playground.corp.mongodb.com/tools/code-sandbox/snapshots/68c02f82d41586ae633f1b8c">🔗 synonyms</Playground>
 
   * st/street, rd/road