Apply suggestions from code review (activator)

Co-authored-by: Genevieve Warren <[email protected]>

Author: davidwrighton

xml/System/Activator.xml

@@ -1020,7 +1020,7 @@ Note: In <see href="https://go.microsoft.com/fwlink/?LinkID=247912">.NET for Win
 ## Remarks
  Use <xref:System.Runtime.Remoting.ObjectHandle.Unwrap%2A?displayProperty=nameWithType> to unwrap the return value.
 
- .NET Core 3.0, .NET Core 3.1 and .NET 5+: Assembly loads triggered by this api are affected by the current value of <xref:System.Runtime.Loader.AssemblyLoadContext.CurrentContextualReflectionContext%2A?displayProperty=nameWithType>.
+ In .NET Core 3.0 and later versions, assembly loads triggered by this API are affected by the current value of <xref:System.Runtime.Loader.AssemblyLoadContext.CurrentContextualReflectionContext%2A?displayProperty=nameWithType>.
 
 > [!NOTE]
 > This method can be used to create nonpublic types if the caller has been granted <xref:System.Security.Permissions.ReflectionPermission> with the <xref:System.Security.Permissions.ReflectionPermissionFlag.RestrictedMemberAccess?displayProperty=nameWithType> flag and if the grant set of the nonpublic types is restricted to the caller's grant set or to a subset thereof. (See [Security Considerations for Reflection](/dotnet/framework/reflection-and-codedom/security-considerations-for-reflection).) To use this functionality, your application should target .NET Framework 3.5 or later.
@@ -1497,7 +1497,7 @@ An error occurred when attempting remote activation in a target specified in <pa
 ## Remarks
  Use <xref:System.Runtime.Remoting.ObjectHandle.Unwrap%2A?displayProperty=nameWithType> to unwrap the return value.
 
- .NET Core 3.0, .NET Core 3.1 and .NET 5+: Assembly loads triggered by this api are affected by the current value of <xref:System.Runtime.Loader.AssemblyLoadContext.CurrentContextualReflectionContext%2A?displayProperty=nameWithType>.
+ In .NET Core 3.0 and later versions, assembly loads triggered by this API are affected by the current value of <xref:System.Runtime.Loader.AssemblyLoadContext.CurrentContextualReflectionContext%2A?displayProperty=nameWithType>.
 
 > [!NOTE]
 > This method can be used to create nonpublic types and members if the caller has been granted <xref:System.Security.Permissions.ReflectionPermission> with the <xref:System.Security.Permissions.ReflectionPermissionFlag.RestrictedMemberAccess?displayProperty=nameWithType> flag and if the grant set of the assembly that contains the nonpublic types and members is restricted to the caller's grant set or to a subset thereof. (See [Security Considerations for Reflection](/dotnet/framework/reflection-and-codedom/security-considerations-for-reflection).) To use this functionality, your application should target .NET Framework 3.5 or later.