docs: update external docs (#2130)

Co-authored-by: Create or Update Pull Request Action <create-or-update-pull-request@users.noreply.github.com>

Co-authored-by: bjohansebas <103585995+bjohansebas@users.noreply.github.com>

Author: github-actions[bot]

_includes/readmes/errorhandler.md

@@ -2,7 +2,7 @@
 
 [![NPM Version][npm-version-image]][npm-url]
 [![NPM Downloads][npm-downloads-image]][npm-url]
-[![Build Status][travis-image]][travis-url]
+<a href="https://github.com/expressjs/errorhandler/actions/workflows/ci.yml"><img src="https://github.com/expressjs/errorhandler/actions/workflows/ci.yml/badge.svg"></a>
 [![Test Coverage][coveralls-image]][coveralls-url]
 
 Development-only error handler middleware.
@@ -126,5 +126,3 @@ function errorNotification (err, str, req) {
 [npm-downloads-image]: https://badgen.net/npm/dm/errorhandler
 [npm-url]: https://npmjs.org/package/errorhandler
 [npm-version-image]: https://badgen.net/npm/v/errorhandler
-[travis-image]: https://badgen.net/travis/expressjs/errorhandler/master
-[travis-url]: https://travis-ci.org/expressjs/errorhandler

_includes/readmes/morgan.md

@@ -193,6 +193,10 @@ The HTTP version of the request.
 
 The HTTP method of the request.
 
+##### :pid
+
+The process ID of the Node.js process handling the request.
+
 ##### :referrer
 
 The Referrer header of the request. This will use the standard mis-spelled Referer header if exists, otherwise Referrer.