[Filebeat] Update checkpoint.source_object mapping (#25145)

* #25124: Update `checkpoint.source_object` mapping

* Update generated

Co-authored-by: Andrew Kroh <andrew.kroh@elastic.co>
(cherry picked from commit a5e6e5b)

CHANGELOG.next.asciidoc

@@ -284,6 +284,7 @@ https://github.com/elastic/beats/compare/v7.0.0-alpha2...master[Check the HEAD d
 - Fix IPtables Pipeline and Ubiquiti dashboard. {issue}24878[24878] {pull}24928[24928]
 - Fix gcp module field names to use gcp instead of googlecloud. {pull}25038[25038]
 - Strip Azure Eventhub connection string in debug logs. {pulll}25066[25066]
+- Change `checkpoint.source_object` from Long to Keyword. {issue}25124[25124] {pull}25145[25145]
 
 *Heartbeat*
 

filebeat/docs/fields.asciidoc

@@ -18089,7 +18089,7 @@ type: integer
 *`checkpoint.duration`*::
 +
 --
-Scan duration.      
+Scan duration.
 
 
 type: keyword
@@ -18179,7 +18179,7 @@ type: integer
 *`checkpoint.next_scheduled_scan_date`*::
 +
 --
-Next scan scheduled time according to time object.     
+Next scan scheduled time according to time object.
 
 
 type: keyword
@@ -19902,7 +19902,7 @@ type: keyword
 Matched object name on source column.
 
 
-type: integer
+type: keyword
 
 --