Improve language tag

Hi! As the model is multilingual, this is a PR to add other languages than English to the language tag to improve the referencing. Note that 29 languages are announced in the README, but only 13 are explicitly listed. I was therefore only able to add these 13 languages.

README.md

@@ -1,18 +1,30 @@
----
-license: apache-2.0
-Model_name: LightPlanner-Qwen2.5-1.5B
-datasets:
-- llamafactory/lima
-- open-r1/OpenR1-Math-220k
-- JettZhou/LightPlan-40k
-language:
-- en
-base_model:
-- Qwen/Qwen2.5-1.5B-Instruct
-tags:
-- LightPlanner
----
-
-LightPlanner-Qwen2.5-1.5B
-
+---
+license: apache-2.0
+Model_name: LightPlanner-Qwen2.5-1.5B
+datasets:
+- llamafactory/lima
+- open-r1/OpenR1-Math-220k
+- JettZhou/LightPlan-40k
+language:
+- zho
+- eng
+- fra
+- spa
+- por
+- deu
+- ita
+- rus
+- jpn
+- kor
+- vie
+- tha
+- ara
+base_model:
+- Qwen/Qwen2.5-1.5B-Instruct
+tags:
+- LightPlanner
+---
+
+LightPlanner-Qwen2.5-1.5B
+
 https://github.com/unira-zwj/LightPlanner