Update PULL_REQUEST_TEMPLATE.md

Signed-off-by: Jan Kowalleck <jan.kowalleck@gmail.com>

Author: jkowalleck

.github/PULL_REQUEST_TEMPLATE.md

@@ -24,7 +24,7 @@ provide the required disclosure, your PR will not be merged.
 <!-- ✍️-->
 A clear and concise summary of the change and which issue (if any) it fixes. Should also include relevant motivation and context.
 
-Resolves or fixes issue: <!-- ✍️ Add GitHub issue number in format `#0000` or `none` -->
+Resolves or fixes issue: <!-- ✍️ Add GitHub issue number in format `#0000` - if there is none fitting, create one -->
 
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