Please Update Examples To Use APPLICATIONINSIGHTS_CONNECTION_STRING Instead of APPINSIGHTS_INSTRUMENTATIONKEY

[bbrandt]

Describe the bug There seems to be a push towards migrating from Application Insights instrumentation keys to connection strings. Please update the examples here to use APPLICATIONINSIGHTS_CONNECTION_STRING instead of APPINSIGHTS_INSTRUMENTATIONKEY.

To Reproduce Steps to reproduce the behavior:

1. Use APPLICATIONINSIGHTS_CONNECTION_STRING instead of APPINSIGHTS_INSTRUMENTATIONKEY

Expected behavior APPLICATIONINSIGHTS_CONNECTION_STRING is referenced in these examples.

Screenshots n/a

Desktop (please complete the following information):

• OS: Linux x64
• Package version (Microsoft.ApplicationInsights.Profiler.AspNetCore) latest
• Application Insights: latest You can usually find that info in your .csproj file.

Additional context n/a