Update PROJECT_IDEA_TEMPLATE.md

Signed-off-by: Ali Ok <[email protected]>

PROJECT_IDEA_TEMPLATE.md

@@ -8,8 +8,8 @@
 - Expected Outcome:
 - Recommended Skills:
 - Mentor(s): # It is recommended to have at least 2 mentors, and at least one of them should be the primary mentor. For GSoC, it is **required** to have at least 2 mentors.
-  - Jane Doe (@jane-github) - primary
-  - John Doe (@john-github)
+  - Jane Doe (@jane-github, [email protected]) - primary
+  - John Doe (@john-github, [email protected])
 - Upstream Issue (URL):
 ```
 
@@ -21,6 +21,6 @@
 - Description: Currently the HTTP API is not very well organized and needs some tidying up. The actual course of action is not decided yet, but [go-kit](https://github.com/go-kit/kit) looks like a good fit.
 - Recommended Skills: golang
 - Mentor(s):
-  - Jane Doe (@jane-github) - primary
-  - John Doe (@john-github)
+  - Jane Doe (@jane-github, [email protected]) - primary
+  - John Doe (@john-github, [email protected])
 - Issue: https://github.com/prometheus/prometheus/issues/3416