Fix typo in documentation URL for options snapshots (#929)

Author: westonplatter

examples/rest/options-snapshots_options_chain.py

@@ -2,7 +2,7 @@
 
 # docs
 # https://polygon.io/docs/options/get_v3_snapshot_options__underlyingasset
-# ttps://polygon-api-client.readthedocs.io/en/latest/Snapshot.html#get-all-snapshots
+# https://polygon-api-client.readthedocs.io/en/latest/Snapshot.html#get-all-snapshots
 
 # client = RESTClient("XXXXXX") # hardcoded api_key is used
 client = RESTClient()  # POLYGON_API_KEY environment variable is used