Update ISSUE_TEMPLATE.md (#2030)

Author: sean-mcmanus

ISSUE_TEMPLATE.md

@@ -11,12 +11,14 @@
     * 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
+    * Step-by-step instructions to reproduce the issue
     * A small code sample, zipped up project, or open source repo we can use to verify the bug
     * Relevant settings from your settings.json, c_cpp_properties.json, and/or launch.json files
     * Any log messages present in the Output window (use "C_Cpp.loggingLevel": "Information" in settings.json)
     * Debugger logs (use "logging": { "engineLogging": true } in your launch.json)
 
+  Call Stacks: For bugs like crashes, deadlocks, infinite loops, etc. that we are not able to repro and for which the call stack may be useful, please attach a debugger and/or create a dmp and provide the call stacks. Starting with 0.17.3, Windows binaries have symbols available in VS Code by setting your "symbolSearchPath" to "http://msdl.microsoft.com/download/symbols".
+
   Please also take a look at our documentation, as we may already have answers for your questions:
     * https://github.com/Microsoft/vscode-cpptools/tree/master/Documentation