Update consistency_models.mdx (huggingface#3961)

Author: sayakpaul

docs/source/en/api/pipelines/consistency_models.mdx

@@ -28,7 +28,7 @@ Available Checkpoints are:
 |:---:|:---:|:---:|:---:|
 | [ConsistencyModelPipeline](https://github.com/huggingface/diffusers/blob/main/src/diffusers/pipelines/pipeline_consistency_models.py) | *Unconditional Image Generation* | | |
 
-This pipeline was contributed by our community members [dg845](https://github.com/dg845) and [ayushtues](https://huggingface.co/ayushtues) :heart: 
+This pipeline was contributed by our community members [dg845](https://github.com/dg845) and [ayushtues](https://huggingface.co/ayushtues) ❤️
 
 ## Usage Example