github: bug template: Propose users to create discussion topic

In order to minimize the number of users creating bug that are actually
an issue in their application, remind the existence and purpose of
github Dicussions.

Signed-off-by: Erwan Gouriou <erwan.gouriou@linaro.org>
diff --git a/.github/ISSUE_TEMPLATE/bug_report.md b/.github/ISSUE_TEMPLATE/bug_report.md
index b6bda1a..91df0ea 100644
--- a/.github/ISSUE_TEMPLATE/bug_report.md
+++ b/.github/ISSUE_TEMPLATE/bug_report.md
@@ -9,6 +9,8 @@
 
 **Describe the bug**
 A clear and concise description of what the bug is.
+(Note that [Github Discussions](https://github.com/zephyrproject-rtos/zephyr/discussions) are available to first verify that the issue
+is a genuine Zephyr bug and not a consequence of Zephyr services misuse.)
 
 Please also mention any information which could help others to understand
 the problem you're facing: