Issue template: add JDK distribution section

Author: vemv

.github/ISSUE_TEMPLATE/bug_report.md

@@ -41,3 +41,13 @@ CIDER's REPL is launched. Here's an example:*
 ### Operating system
 
 *E.g. Fedora 23, OS X 10.11 "El Capitan", Windows 10, etc*
+
+### JDK distribution
+
+*The JDK distribution are you using (e.g. Oracle, Temurin, Corretto), and its version. (run `java -version` for obtaining this)*
+
+*Please note that you should be running a JDK, not a JRE.*
+
+*If you are using a JDK through Docker, please indicate the Docker image being used.*
+
+*Please note that especially on Linux, JDK sources may be absent by default and require a separate installation step.*