[powershell] block comment does not auto-close. Fixes #9799

Author: aeschli

extensions/powershell/language-configuration.json

@@ -14,7 +14,8 @@
 		["(", ")"],
 		{ "open": "\"", "close": "\"", "notIn": ["string"]},
 		{ "open": "'", "close": "'", "notIn": ["string", "comment"]},
-		["/**", " */"]
+		["/**", " */"],
+		["<#", "#>"]
 	],
 	"surroundingPairs": [
 		["{", "}"],