PARQUET-1219: Update release-candidate script links to gitbox

Author: Uwe L. Korn <uwelk@xhochy.com>

Closes #439 from xhochy/PARQUET-1219 and squashes the following commits:

35f83bf [Uwe L. Korn] PARQUET-1219: Update release-candidate script links to gitbox
diff --git a/dev/release/release-candidate b/dev/release/release-candidate
index aa7350a..88aa27a 100755
--- a/dev/release/release-candidate
+++ b/dev/release/release-candidate
@@ -28,7 +28,7 @@
 
 rc_number=0
 override_version=''
-parquetcpp_git_web_url='https://git-wip-us.apache.org/repos/asf?p=parquet-cpp.git'
+parquetcpp_git_web_url='https://gitbox.apache.org/repos/asf?p=parquet-cpp.git'
 parquet_svn_dist_url='https://dist.apache.org/repos/dist/dev/parquet'
 
 function print_help_and_exit {