Fixed remarks on limitations (#3716)

`GetAwaiter` was mistakenly written where `Result` or `GetAwaiter().GetResult()` should be

Author: BalassaMarton

xml/System.Threading.Tasks/ValueTask`1.xml

@@ -46,7 +46,7 @@
       <format type="text/markdown"><![CDATA[ 
 
 ## Remarks  
-A <xref:System.Threading.Tasks.ValueTask%601> instance may either be awaited or converted to a <xref:System.Threading.Tasks.Task%601> using <xref:System.Threading.Tasks.ValueTask%601.AsTask%2A>. A <xref:System.Threading.Tasks.ValueTask%601> instance may only be awaited once, and consumers may not call <xref:System.Threading.Tasks.ValueTask%601.GetAwaiter> until the instance has completed. If these limitations are unacceptable, convert the <xref:System.Threading.Tasks.ValueTask%601> to a <xref:System.Threading.Tasks.Task%601> by calling <xref:System.Threading.Tasks.ValueTask%601.AsTask%2A>.
+A <xref:System.Threading.Tasks.ValueTask%601> instance may either be awaited or converted to a <xref:System.Threading.Tasks.Task%601> using <xref:System.Threading.Tasks.ValueTask%601.AsTask%2A>. A <xref:System.Threading.Tasks.ValueTask%601> instance may only be awaited once, and consumers may not read <xref:System.Threading.Tasks.ValueTask%601.Result> until the instance has completed. If these limitations are unacceptable, convert the <xref:System.Threading.Tasks.ValueTask%601> to a <xref:System.Threading.Tasks.Task%601> by calling <xref:System.Threading.Tasks.ValueTask%601.AsTask%2A>.
 
 The following operations should never be performed on a <xref:System.Threading.Tasks.ValueTask%601> instance: