Update .github/issue_template.md

Reword traces addition.

Co-authored-by: Paul Szczepanek <[email protected]>

Author: pan-

.github/issue_template.md

@@ -48,8 +48,7 @@
 #### How is this defect reproduced ? 
 
 <!--
-    For connectivity issues it is recommended to enable mbed trace and join traces 
+    For connectivity issues it is recommended to enable mbed trace and attach the traces 
     generated by the logger to the issue. 
 -->
 
-