docs: Fix links

Author: javierbrea

.github/PULL_REQUEST_TEMPLATE.md

@@ -8,8 +8,8 @@ __Please provide enough information and context so that others can review your p
 
 Please check the following boxes after you have read and understood each item.
 
-* [ ] I have read the [CONTRIBUTING](./.github/CONTRIBUTING.md) document
-* [ ] I have read the [CODE_OF_CONDUCT](./.github/CODE_OF_CONDUCT.md) document
+* [ ] I have read the [CONTRIBUTING](https://github.com/Telefonica/markdown-confluence-sync-action/blob/main/.github/CONTRIBUTING.md) document
+* [ ] I have read the [CODE_OF_CONDUCT](https://github.com/Telefonica/markdown-confluence-sync-action/blob/main/.github/CODE_OF_CONDUCT.md) document
 * [ ] I accept that, by signing the Contributor License Agreement through a comment in the PR, my Github user name will be stored by in a branch of this repository for future reference.
 
 In case this is your first contribution to this project, you will also have to **add a comment with the following text: "_I have read the CLA Document and I hereby sign the CLA_"**, otherwise the PR status will fail and our bot will request you to add it. Once you have signed it in a PR, you will not have to sign it again for future contributions.