chore(core): Fixed incorrect types for custom parts

Author: OXY2DEV

lua/bars/components/statuscolumn.lua

@@ -342,7 +342,7 @@ end
 ---@param config statusline.parts.custom
 ---@return string
 scC.custom = function (_, _, config)
-	return config.value;
+	return config.value --[[ @as string ]];
 end
 
 --- Returns the output of the section {name}.

lua/bars/components/statusline.lua

@@ -474,7 +474,7 @@ end
 ---@param config statusline.parts.custom
 ---@return string
 slC.custom = function (_, _, config)
-	return config.value;
+	return config.value --[[ @as string ]];
 end
 
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