Update ISSUE_TEMPLATE.md

Author: bobbrow

ISSUE_TEMPLATE.md

@@ -2,7 +2,7 @@
   If this is a bug report, please give us as much information as possible so we can reproduce your issue.
   Examples of information that can help us find and fix bugs:
     * Operating System and version
-    * VS Code version and if you are using the Insider build
+    * VS Code version and if you are using the Insiders build
     * C/C++ extension version
     * Other extensions you installed and if the issue persists after disabling them
     * step-by-step instructions to reproduce the issue