Mention RoslynTargetsPath

Author: jjonescz

documentation/general/decouple-vs-and-net-sdk.md

@@ -136,6 +136,9 @@ To mitigate this we will be fixing the `build-server shutdown` command to be rel
 Based on the value of the `RoslynCompilerType` property, the SDK sets property `RoslynTasksAssembly` to a full path to a [Roslyn build task DLL][roslyn-build-task],
 and the SDK targets use `$(RoslynTasksAssembly)` to load the build task.
 
+The SDK also sets `RoslynTargetsPath` to the directory path of the roslyn tasks assembly. This property is used by some targets
+but it should be avoided if possible because the tasks assembly name can change as well, not just the directory path.
+
 These values are recognized for property `RoslynCompilerType`:
 - `Core`: use the compiler that comes with the .NET SDK
 - `Framework`: use the compiler that comes with .NET Framework MSBuild