Github issue template: updates

1. Add more recent release version numbers in the examples
2. Add request for output from `git submodule status` when
   building/installing from a git clone

Signed-off-by: Jeff Squyres <jsquyres@cisco.com>

.github/issue_template.md

@@ -2,7 +2,7 @@ Thank you for taking the time to submit an issue!
 
 ## Background information
 
-### What version of Open MPI are you using? (e.g., v1.10.3, v2.1.0, git branch name and hash, etc.)
+### What version of Open MPI are you using? (e.g., v3.0.5, v4.0.2, git branch name and hash, etc.)
 
 
 
@@ -10,6 +10,10 @@ Thank you for taking the time to submit an issue!
 
 
 
+### If you are building/installing from a git clone, please copy-n-paste the output from `git submodule status`.
+
+
+
 ### Please describe the system on which you are running
 
 * Operating system/version: