Update ISSUE_TEMPLATE.md

.github/ISSUE_TEMPLATE.md

@@ -2,6 +2,6 @@ If this is a bug report, please fill in the blanks:
 
 *  I am using the ___________ browser.
 *  My computer's OS is ___________.
-*  I'm running Metabase ___________ [locally from the JAR / locally with the Mac App / on AWS / on Herkou / etc.] and it is using the ___________ [Postgres / MySQL / H2 (default)] database.
+*  I'm running Metabase ___________ [locally from the JAR / locally with the Mac App / on AWS / on Herkou / etc.] and it is using ___________ [Postgres / MySQL / H2 (default)] internally. (If you haven't done anything special to configure this, Metabase will be using H2).
 *  My data is in a ___________ database. [Postgres / MySQL / Redshift / BigQuery / MongoDB / SQLite / SQL Server / etc.]
 *  My Metabase version is ___________.