Troubleshooting entry on docs re: SDK degrading performance

[jas-kas]

Mention appropriate SDK version to get the latest fix for Performance Overhead on our SDK Troubleshooting docs.

This entry can evolve as more Performance Issue fixes come to light and we update the SDK version.

[jas-kas]

cc/ @mydea @billyvg

[billyvg]

@bruno-garcia I've added docs on mutationLimit here: #7068

Maybe we can talk about optimizing large lists in this section as an example? (just random link i found for angular: https://www.thecodecampus.de/blog/optimize-the-performances-of-large-lists-in-your-angular-application/)

[bruno-garcia]

I also added an entry to the breadcrumb: #7109

In the event folks get confused with that this actually means, and what to do about it