process: this should not match PR-URL

Fixes: nodejs/changelog-maker#35
PR-URL: #1
Reviewed-By: Rod Vagg <rod@vagg.org>

Author: Lars-Magnus Skog

commit-stream.js

@@ -31,7 +31,7 @@ function commitStream (ghUser, ghProject) {
       if (!commit.reviewers)
         commit.reviewers = []
       commit.reviewers.push({ name: m[1], email: m[2] })
-    } else if (m = line.match(/^\s+PR(?:[- ]?URL)?:?\s*(.+)\s*$/i)) {
+    } else if (m = line.match(/^\s+PR(?:[- ]?URL)?:?\s*(.+)\s*$/)) {
       commit.prUrl = m[1]
       if (ghUser && ghProject && (m = commit.prUrl.match(/^\s*#?(\d+)\s*$/))) {
         commit.prUrl = 'https://github.com/' + ghUser + '/' + ghProject + '/pull/' + m[1]