Added regression question to github issue template (#176)

Author: shreyas-goenka

.github/ISSUE_TEMPLATE/sdk-issue.md

@@ -16,6 +16,9 @@ A minimal code sample demonstrating the bug.
 **Expected behavior**
 A clear and concise description of what you expected to happen.
 
+**Is it a regression?**
+Did this work in a previous version of the SDK? If so, which versions did you try?
+
 **Debug Logs**
 The SDK logs helpful debugging information when debug logging is enabled. Set the log level to TRACE (e.g. add `log4j.logger.com.databricks=TRACE` to the log4j.properties in your project), and include the logs here.