docs(README): fix setup references (#9502)

## About the changes
* Fix WRONG setUp references

## How to review?
* Check 
  * existing links do NOT redirect to the proper subsections
  * suggested links redirect properly

Author: dancer1325

README.md

@@ -27,7 +27,7 @@ Unleash is the most popular open-source solution for feature flagging on GitHub.
 
 ### Set up Unleash
 
-To get started with Unleash, you can either explore [Unleash Enterprise](#set-up-unleash-enterprise) with a free trial or [get started locally](#set-up-unleash-locally) with our open-source solution.
+To get started with Unleash, you can either explore [Unleash Enterprise](#unleash-enterprise) with a free trial or [get started locally](#unleash-open-source) with our open-source solution.
 
 #### Unleash Enterprise