Update example.env

Author: kartikpersistent

frontend/example.env

@@ -1,7 +1,7 @@
 VITE_BACKEND_API_URL="http://localhost:8000"
 VITE_BLOOM_URL="https://workspace-preview.neo4j.io/workspace/explore?connectURL={CONNECT_URL}&search=Show+me+a+graph&featureGenAISuggestions=true&featureGenAISuggestionsInternal=true"
 VITE_REACT_APP_SOURCES="local,youtube,wiki,s3,web"
-VITE_LLM_MODELS="diffbot,openai-gpt-3.5,openai-gpt-4o"
+VITE_LLM_MODELS="diffbot,openai_gpt_3.5,openai_gpt_4o"
 VITE_ENV="DEV"
 VITE_TIME_PER_PAGE=50
 VITE_CHUNK_SIZE=5242880