[cherry-pick] Update update-release-tracker.sh (#40)

/cherry-pick
Signed-off-by: Tamal Saha <tamal@appscode.com>

Co-authored-by: Tamal Saha <tamal@appscode.com>

Author: 1gtm

hack/scripts/update-release-tracker.sh

@@ -35,7 +35,7 @@ parse_url() {
 
 RELEASE_TRACKER=
 
-while IFS=$': \t' read -r -u9 marker v; do
+while IFS=$': \r\t' read -r -u9 marker v; do
     case $marker in
         Release-tracker)
             export RELEASE_TRACKER=$v