fix 'back to top' link

README.md

@@ -1857,7 +1857,7 @@ _Related: [Software Development - Low Code](#software-development---low-code)_
 
 ### Software Development - Low Code
 
-**[`^        back to top        ^`](#)**
+**[`^        back to top        ^`](#awesome-selfhosted)**
 
 A [low-code](https://en.wikipedia.org/wiki/Low-code_development_platform) development platform (LCDP) provides a development environment used to create application software through a graphical user interface.