doc: missing documentation of quoting the URL of url.Errors in go1.14 release notes [1.14 backport]

[gopherbot]

@dmitshur requested issue #37614 to be considered for backport to the next 1.14 minor release.

This needs to be fixed on master branch first, then it can be backported to Go 1.14.x.

@gopherbot Please open a backport issue for Go 1.14; this is a documentation fix.

[dmitshur]

Approving because this is a documentation fix, which is in line with the backporting policy.

[gopherbot]

Change https://golang.org/cl/222037 mentions this issue: doc/go1.14: document that unparsable URL in net/url.Error is now quoted

[gopherbot]

Change https://golang.org/cl/222317 mentions this issue: [release-branch.go1.14] doc/go1.14: document that unparsable URL in net/url.Error is now quoted

[gopherbot]

Closed by merging 0e9f7ac to release-branch.go1.14.

[stefanb]

Now published live at https://golang.org/doc/go1.14#net/url