clarify URL resolution of package specifiers

doc/api/esm.md

@@ -227,7 +227,7 @@ The algorithm to resolve an ES module specifier is provided through _ESM_RESOLVE
 >    1. Return _"node:${packageName}"_.
 > 1. Set _parentURL_ to the parent folder URL of _parentURL_.
 > 1. While _parentURL_ contains a non-empty _pathname_,
->    1. Let _packageURL_ be equal to _"${parentURL}/node_modules/${packageName}"_.
+>    1. Let _packageURL_ be the URL resolution of _"${parentURL}/node_modules/${packageName}"_.
 >    1. If the folder at _packageURL_ does not exist then,
 >       1. Note: This check can be optimized out where possible in implementation.
 >       1. Set _parentURL_ to the parent URL path of _parentURL_.
@@ -237,7 +237,7 @@ The algorithm to resolve an ES module specifier is provided through _ESM_RESOLVE
 >       1. If _url_ is not _undefined_ then,
 >          1. Return _url_.
 >    1. Otherwise,
->       1. Let _url_ be equal to _"${packageURL}/${packagePath}"_.
+>       1. Let _url_ be equal to the URL resolution of _packagePath_ in _packageURL_.
 >       1. If the file at _url_ exists then,
 >          1. Return _url_.
 >       1. Otherwise, if _url_ is a directory then,