[Doc] Convert Sphinx directives ( {class}, {meth}, {attr}, ...) to MkDocs format for better documentation linking (#18663)

Signed-off-by: Zerohertz <ohg3417@gmail.com>

vllm/model_executor/models/molmo.py

@@ -965,7 +965,7 @@ def select_tiling(
 
 class MolmoProcessorWrapper:
     """
-    Wraps {class}`MolmoProcessor` so that it can be called directly.
+    Wraps `MolmoProcessor` so that it can be called directly.
 
     The original definition can be found here:
     https://huggingface.co/allenai/Molmo-7B-D-0924/blob/main/preprocessing_molmo.py