change NRT for ITypeMap.GetConstructorParameter (#1980)

* release notes for NRT tweak

* PR number

Author: mgravell

docs/index.md

@@ -27,6 +27,7 @@ Note: to get the latest pre-release build, add ` -Pre` to the end of the command
 - infer command text without any whitespace as stored-procedure (#1975 via @mgravell)
 - add global `SupportLegacyParameterTokens` setting to enable or disable single-character parameter tokens (#1974 via @Giorgi)
 - revert `$` addition for legacy parameter tokens (#1979 via @mgravell)
+- change NRT annotation on `GetConstructorParameter` (#1980 via @mgravell, fixes #1969)
 
 ### 2.1.4