[Rule Tuning] Update MDE tags to "Microsoft Defender XDR" (#5927)

* [Rule Tuning] Fix MS Defender XDR tag

* bump upodated_date

rules/windows/initial_access_script_executing_powershell.toml

@@ -2,7 +2,7 @@
 creation_date = "2020/02/18"
 integration = ["endpoint", "windows", "m365_defender", "sentinel_one_cloud_funnel"]
 maturity = "production"
-updated_date = "2026/03/24"
+updated_date = "2026/04/07"
 
 [rule]
 author = ["Elastic"]
@@ -86,7 +86,7 @@ tags = [
     "Data Source: Elastic Endgame",
     "Data Source: Elastic Defend",
     "Data Source: Sysmon",
-    "Data Source: Microsoft Defender for Endpoint",
+    "Data Source: Microsoft Defender XDR",
     "Data Source: SentinelOne",
 ]
 timestamp_override = "event.ingested"