Update issue creation link on request-a-package-update.md (#454)

Change link to create a new issue to point to the form specifically designed for requesting package updates

docs/packaging/procedures/request-a-package-update.md

@@ -17,4 +17,4 @@ You will be asked in the form to provide the following information:
 - Description: Explanation as to the value-add of updating this package.
 - Link to source tarball/zip file. Note: master.zip files **are not permitted**. We require versioned tarballs, for example: "1.2.3.tar.gz".
 
-Please put this into a new [issue](https://github.com/getsolus/packages/issues/new?assignees=&labels=Package+Request&projects=&template=request-package-update.yaml).
+Please put this into a new [issue](https://github.com/getsolus/packages/issues/new?assignees=&labels=Package+Update+Request&projects=&template=request-package-update.yml).