info.ini: Add Source.Python forums URL

Signed-off-by: BackRaw <backraw@gmx.de>

Author: BackRaw

addons/source-python/plugins/flashfun/info.ini

@@ -2,4 +2,4 @@ verbose_name = "FlashFun"
 author = "BackRaw"
 description = "Kill enemies using flashbang grenades."
 version = "1.0"
-url = ""
+url = "https://forums.sourcepython.com/viewtopic.php?f=7&t=596"