add notice for the issue templates

.github/ISSUE_TEMPLATE/bug-report.md

@@ -6,6 +6,8 @@ labels: bug
 assignees: ''
 
 ---
+<!-- PLEASE FILL THESE FIELDS, IT REALLY HELPS THE MAINTAINERS OF SEARX -->
+
 **Version of Searx, commit number if you are using on master branch and stipulate if you forked Searx**
 <!-- If you are running on master branch using git execute this command
 in order to fetch the latest commit ID:

.github/ISSUE_TEMPLATE/engine-request.md

@@ -6,6 +6,8 @@ labels: enhancement, engine request
 assignees: ''
 
 ---
+<!-- PLEASE FILL THESE FIELDS, IT REALLY HELPS THE MAINTAINERS OF SEARX -->
+
 **Working URL to the engine**
 <!-- Please check if the engine is responding correctly before submitting it. -->
 

.github/ISSUE_TEMPLATE/feature-request.md

@@ -6,6 +6,8 @@ labels: enhancement
 assignees: ''
 
 ---
+<!-- PLEASE FILL THESE FIELDS, IT REALLY HELPS THE MAINTAINERS OF SEARX -->
+
 **Is your feature request related to a problem? Please describe.**
 <!-- A clear and concise description of what the problem is. Ex. I'm always frustrated when [...] -->