Lua README updates

Author: rtoal

lua/README.md

@@ -37,16 +37,19 @@ Continue your study of Lua via:
 - [Awesome Lua](https://github.com/LewisJEllis/awesome-lua)
 - [Lua Home](http://www.lua.org/)
 - [List of Lua Books](http://www.lua.org/docs.html#books)
-- [Lua Reference Manual](http://www.lua.org/manual/5.4/)
-- [The book _Programming in Lua_ by Lua’s creator, Roberto Ierusalimschy](http://www.lua.org/pil/)
+- [Lua Reference Manual](http://www.lua.org/manual/)
+- The book [_Programming in Lua_](http://www.lua.org/pil/) by Lua’s creator, Roberto Ierusalimschy
 - [List of Lua Books](https://realtoughcandy.com/best-lua-books/)
 - [List of video games scripted in Lua](<https://en.wikipedia.org/wiki/Category:Lua_(programming_language)-scripted_video_games>)
 
 ## Lua Open Source Projects
 
 Studying, and contributing to, open source projects is an excellent way to improve your proficiency in any language. Of the many projects using Lua, you may enjoy:
 
+- [Trending Lua Repositories on GitHub](https://github.com/trending/lua)
+- [Top 100 Starred Lua Repositories on GitHub](https://github.com/EvanLi/Github-Ranking/blob/master/Top100/Lua.md)
 - [Luvit](https://github.com/luvit/luvit)
+- [KOReader](https://github.com/koreader/koreader)
 - [CorsixTH](https://github.com/CorsixTH/CorsixTH)
 - [termtris](https://github.com/tylerneylon/termtris)
 - [PacPac](https://github.com/tylerneylon/pacpac)