Editorial: Change "lexical environment" to "Environment Record"

... in FunctionDeclarationInstantiation,
to balance the NOTE in the other arm of the if-else,
and also for consistency with the NOTE at 27.a.

(I should have done this in PR tc39#1697.)

Author: jmdyck

spec.html

@@ -8624,7 +8624,7 @@ <h1>FunctionDeclarationInstantiation ( _func_, _argumentsList_ )</h1>
           1. If *"arguments"* is an element of _functionNames_ or if *"arguments"* is an element of _lexicalNames_, then
             1. Set _argumentsObjectNeeded_ to *false*.
         1. If _strict_ is *true* or if _hasParameterExpressions_ is *false*, then
-          1. NOTE: Only a single lexical environment is needed for the parameters and top-level vars.
+          1. NOTE: Only a single Environment Record is needed for the parameters and top-level vars.
           1. Let _env_ be the LexicalEnvironment of _calleeContext_.
         1. Else,
           1. NOTE: A separate Environment Record is needed to ensure that bindings created by direct eval calls in the formal parameter list are outside the environment where parameters are declared.