Update README.md - Typo in dotnet-coverage cmd

Author: sahinM

samples/Calculator/scenarios/scenario15/README.md

@@ -9,7 +9,7 @@ git clone https://github.com/microsoft/codecoverage.git
 cd codecoverage/samples/Calculator
 dotnet build
 dotnet tool install -g dotnet-coverage
-otnet-coverage collect --output-format cobertura --output report.cobertura.xml --session-id TagScenario15 --background --server-mode
+dotnet-coverage collect --output-format cobertura --output report.cobertura.xml --session-id TagScenario15 --background --server-mode
 cd src/Calculator.Server
 dotnet-coverage connect --background TagScenario15 "dotnet run --no-build"
 cd ../../tests/Calculator.Server.IntegrationTests
@@ -148,4 +148,4 @@ steps:
 
 ![alt text](example.report.jpg "Example report")
 
-[Link](example.report.cobertura.xml)
+[Link](example.report.cobertura.xml)