fix documentation (#183)

Author: henomis

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,5 +1,7 @@
 # Pull Request Template
 
+⚠️ **Please do not submit a Pull Request without creating an issue first. Any change needs to be discussed.**
+
 ## Description
 
 Please include a summary of the change and which issue is fixed. Please also include relevant motivation and context. List any dependencies that are required for this change.