Update docs/pos/how-to/smart-contracts/quicknode.md

Co-authored-by: Dra Murphy <149679879+kmurphypolygon@users.noreply.github.com>

Author: hsutaiyu

docs/pos/how-to/smart-contracts/quicknode.md

@@ -174,7 +174,7 @@ You can check out the deployed contract by copy-pasting the contract address at
 
 ![img](../../../img/pos/polygonscan.png)
 
-## Testing the Contract
+## Testing the contract
 
 Brownie also offers the option of testing smart contracts functionalities. It uses the `pytest` framework to easily generate unit tests. You can find more information about writing tests on Bronwnie [on their documentation](https://eth-brownie.readthedocs.io/en/latest/tests-pytest-intro.html#).