Use dotnetcli in DiagnosticScenarios/readme.md (#1855)

* Fix link in DiagnosticScenarios/readme.md

* Update readme.md

* Update readme.md

Author: Youssef1313

core/diagnostics/DiagnosticScenarios/readme.md

@@ -16,7 +16,7 @@ The sample debug target is a simple `webapi` application. The sample triggers un
 
 After downloading the source, you can easily run the webapi using:
 
-```console
+```dotnetcli
 dotnet build
 dotnet run
 ```
@@ -27,24 +27,32 @@ The target triggers undesirable behaviors when hitting specific URLs.
 
 ### Deadlock
 
-`http://localhost:5000/api/diagscenario/deadlock`
+```http
+http://localhost:5000/api/diagscenario/deadlock
+```
 
 This method will cause the target to hang and accumulate many threads.
 
 ### High CPU usage
 
-`http://localhost:5000/api/diagscenario/highcpu/{milliseconds}`
+```http
+http://localhost:5000/api/diagscenario/highcpu/{milliseconds}
+```
 
 The method will cause to target to heavily use the CPU for a duration specified by {milliseconds}.
 
 ### Memory leak
 
-`http://localhost:5000/api/diagscenario/memleak/{kb}`
+```http
+http://localhost:5000/api/diagscenario/memleak/{kb}
+```
 
 This method will cause the target to leak memory (amount specified by {kb}).
 
 ### Memory usage spike
 
-`http://localhost:5000/api/diagscenario/memspike/{seconds}`
+```http
+http://localhost:5000/api/diagscenario/memspike/{seconds}
+```
 
 This method will cause intermittent memory spikes over the specified number of seconds. Memory will go from base line to spike and back to baseline several times.