Added support for OSSL to the extension

While .lsl is the most common extension for all things LSL, the .ossl extension ought to be the 'approved' variation for the OSSL dialect of LSL...

Author: GwynethLlewelyn

extension.json

@@ -12,7 +12,7 @@
 	"keywords": ["Second Life", "SL", "OpenSimulator", "LSL", "Linden Scripting Language"],
 	"license": "bsd-3-clause",
 	"categories": ["completions", "languages", "commands"],
-	"activationEvents": ["onLanguage:LSL", "onWorkspaceContains:*.lsl"],
+	"activationEvents": ["onLanguage:LSL", "onWorkspaceContains:*.lsl", "onWorkspaceContains:*.ossl"],
 
 	"main": "main.js",