Update PULL_REQUEST_TEMPLATE.md

Update links, add explanation for Description

.github/PULL_REQUEST_TEMPLATE.md

@@ -2,17 +2,18 @@
 <!--  Please describe which issue this Pull Request targets
 
 If there is no issue, please create one so we can look into it before approving your PR.
-You can do so here: https://github.com/IntellectualSites/FastAsyncWorldEdit-1.13/issues
+You can do so here: https://github.com/IntellectualSites/FastAsyncWorldEdit/issues
 -->
 
 <!-- Remove the brackets around the issue to connect your pull request with the issue it resolves -->
 **Fixes #{issue number}**
 
 ## Description
+<!-- Please describe what you have changed -->
 
 ## Checklist
 <!-- Make sure you have completed the following steps (put an "X" between of brackets): -->
 - [] I included all information required in the sections above
 - [] I tested my changes and approved their functionality
 - [] I ensured my changes do not break other parts of the code
-- [] I read and followed the [contribution guidelines](https://github.com/IntellectualSites/FastAsyncWorldEdit-1.13/blob/1.15/CONTRIBUTING.md)
+- [] I read and followed the [contribution guidelines](https://github.com/IntellectualSites/FastAsyncWorldEdit/blob/1.15/CONTRIBUTING.md)