Replace programming language topics with language filters

If users want to explore different programming languages for Hacktoberfest, they should look at opted-in repositories withe  topic and use GitHub's built-in tooling for filtering by language

Author: MattIPv4

topics/hacktoberfest/index.md

@@ -17,4 +17,4 @@ aliases: hacktoberfest-contributions, hacktoberfest-repo, hacktoberfest-contribu
 [🇳🇵 Nepal](https://github.com/topics/hacktoberfestnepal) • [🇮🇩 Indonesia](https://github.com/topics/hacktoberfest-indonesia) • **[🇮🇳 India](https://github.com/topics/hacktoberfest-india)** ([West Bengal](https://github.com/topics/hacktoberfest-westbengal)) • [🇧🇷 Brazil](https://github.com/topics/hacktoberfest-brasil)
 
 # By programming language
-[React.js](https://github.com/topics/react-hacktoberfest) ([topic](https://github.com/topics/react)) • [Python](https://github.com/topics/hacktoberfestpy) ([topic](https://github.com/topics/python)) • [Java](https://github.com/topics/hacktoberfest-java) ([topic](https://github.com/topics/java))
+[JavaScript](https://github.com/topics/hacktoberfest?l=javascript) • [Python](https://github.com/topics/hacktoberfest?l=python) • [Java](https://github.com/topics/hacktoberfest?l=java)