FIX: correct typo (#5387)

### What problem does this PR solve?

Correct typo in supported_models file

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

api/apps/llm_app.py

@@ -173,7 +173,7 @@ def add_llm():
         api_key = req.get("api_key", "xxxxxxxxxxxxxxx")
 
     elif factory == "VLLM":
-        llm_name = req["llm_name"] + "___OpenAI-API"
+        llm_name = req["llm_name"] + "___VLLM"
         api_key = req.get("api_key", "xxxxxxxxxxxxxxx")
 
     elif factory == "XunFei Spark":

docs/references/supported_models.mdx

@@ -42,7 +42,7 @@ A complete list of models supported by RAGFlow, which will continue to expand.
 | Ollama                | :heavy_check_mark: | :heavy_check_mark: |                    | :heavy_check_mark: |                    |                    |
 | OpenAI                | :heavy_check_mark: | :heavy_check_mark: |                    | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: |
 | OpenAI-API-Compatible | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: |                    |                    |
-| VLMM                  | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: |                    |                    |
+| VLLM                  | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: |                    |                    |
 | OpenRouter            | :heavy_check_mark: |                    |                    | :heavy_check_mark: |                    |                    |
 | PerfXCloud            | :heavy_check_mark: | :heavy_check_mark: |                    |                    |                    |                    |
 | Replicate             | :heavy_check_mark: | :heavy_check_mark: |                    |                    |                    |                    |