Merge pull request #180 from tsugumi-sys/feature/update-readme-wiki-s…

…p500

Docs: Adding wiki sp500 to readme

README.md

@@ -75,6 +75,7 @@ Now you can see the Nasdaq API data on your metabase dashborad!
 | Nasdaq API (Screener) | ✅ | [URL](https://www.nasdaq.com/market-activity/stocks/screener) | |
 | Polygon API (Stock Financials Vx) | ✅ | [URL](https://polygon.io/docs/stocks/get_vx_reference_financials) | [Data Fields Information](https://polygon.io/blog/financials-api-glossary-of-fields) |
 | Polygon API (Tickers) | 🚧 | [URL](https://polygon.io/docs/stocks/get_v3_reference_tickers) | |
+| Wikipedia: List of S&P 500 companies | ✅ | [URL](https://en.wikipedia.org/wiki/List_of_S%26P_500_companies) |  |
 
 ## Examples