Adjust Readme to reflect workflow changes (#703)

* adjust Readme to reflect workflow changes

* fix indentation

README.md

@@ -1,7 +1,7 @@
 # Uniswap v4 Core
 
 [![Lint](https://github.com/Uniswap/v4-core/actions/workflows/lint.yml/badge.svg)](https://github.com/Uniswap/v4-core/actions/workflows/lint.yml)
-[![Tests](https://github.com/Uniswap/v4-core/actions/workflows/tests.yml/badge.svg)](https://github.com/Uniswap/v4-core/actions/workflows/tests.yml)
+[![Tests](https://github.com/Uniswap/v4-core/actions/workflows/tests-merge.yml/badge.svg)](https://github.com/Uniswap/v4-core/actions/workflows/tests-merge.yml)
 
 Uniswap v4 is a new automated market maker protocol that provides extensible and customizable pools. `v4-core` hosts the core pool logic for creating pools and executing pool actions like swapping and providing liquidity.