[Lustre] Fix OSS param typo (DataDog#20857)

* Fix OSS param typo

* Add changelog

Author: dkirov-dd

lustre/changelog.d/20857.fixed

@@ -0,0 +1 @@
+Fix typo in OSS parameter

lustre/datadog_checks/lustre/constants.py

@@ -320,7 +320,7 @@ class LustreParam:
         fixture='mds_mgs_export_stats.txt',
     ),
     # OSS (Object Storage Server) params
-    LustreParam(regex='ost.OSS.oss.stats', node_types=('oss',), prefix='oss', fixture='oss_ost_stats.txt'),
+    LustreParam(regex='ost.OSS.ost.stats', node_types=('oss',), prefix='oss', fixture='oss_ost_stats.txt'),
     LustreParam(
         regex='osc.*.stats',
         node_types=('client',),