fix: pull request template link on contribute guide

Co-Authored-By: Jose M <[email protected]>

CONTRIBUTING.md

@@ -160,7 +160,7 @@ The process described here has several goals:
 
 Please follow these steps to have your contribution considered by the maintainers:
 
-1. Follow all instructions in [the template](PULL_REQUEST_TEMPLATE.md)
+1. Follow all instructions in [the template](https://github.com/getlago/lago/blob/main/PULL_REQUEST_TEMPLATE.md)
 2. Follow the [styleguides](#styleguides)
 3. After you submit your pull request, verify that all [status checks](https://help.github.com/articles/about-status-checks/) are passing <details><summary>What if the status checks are failing?</summary>If a status check is failing, and you believe that the failure is unrelated to your change, please leave a comment on the pull request explaining why you believe the failure is unrelated. A maintainer will re-run the status check for you. If we conclude that the failure was a false positive, then we will open an issue to track that problem with our status check suite.</details>