Bump proposal version

Author: mjbvz

package.json

@@ -14,7 +14,7 @@
 		"activeComment",
 		"chatParticipantAdditions",
 		"chatParticipantPrivate",
-		"chatSessionsProvider@2",
+		"chatSessionsProvider@3",
 		"codiconDecoration",
 		"codeActionRanges",
 		"commentingRangeHint",
@@ -4364,4 +4364,4 @@
 		"string_decoder": "^1.3.0"
 	},
 	"license": "MIT"
-}
+}