Remove blank space at the end of label

Removed white space because in crowdin translation there is no space at end of text

Author: gihovani

app/code/Magento/Cron/etc/adminhtml/system.xml

@@ -12,7 +12,7 @@
                 <label>Cron (Scheduled Tasks)</label>
                 <comment>For correct URLs generated during cron runs please make sure that Web &gt; Secure and Unsecure Base URLs are explicitly set. All the times are in minutes.</comment>
                 <group id="template" translate="label" type="text" sortOrder="10" showInDefault="1" showInWebsite="0" showInStore="0">
-                    <label>Cron configuration options for group: </label>
+                    <label>Cron configuration options for group:</label>
                     <field id="schedule_generate_every" translate="label" type="text" sortOrder="10" showInDefault="1" showInWebsite="0" showInStore="0" canRestore="1">
                         <label>Generate Schedules Every</label>
                         <validate>validate-zero-or-greater validate-digits</validate>

app/code/Magento/Cron/i18n/en_US.csv

@@ -11,7 +11,7 @@ Monthly,Monthly
 "Test exception","Test exception"
 "Cron (Scheduled Tasks)","Cron (Scheduled Tasks)"
 "For correct URLs generated during cron runs please make sure that Web > Secure and Unsecure Base URLs are explicitly set. All the times are in minutes.","For correct URLs generated during cron runs please make sure that Web > Secure and Unsecure Base URLs are explicitly set. All the times are in minutes."
-"Cron configuration options for group: ","Cron configuration options for group: "
+"Cron configuration options for group:","Cron configuration options for group:"
 "Generate Schedules Every","Generate Schedules Every"
 "Schedule Ahead for","Schedule Ahead for"
 "Missed if Not Run Within","Missed if Not Run Within"