Clarify TOL-200M revision used for training

Also improves formatting of homepage URL (displays "BioCLIP 2 Project Page" instead of partial URL).

README.md

@@ -67,7 +67,7 @@ We evaluate BioCLIP 2 on a diverse set of biological tasks. Through training at
 
 ### Model Sources
 
-- **Homepage:** https://imageomics.github.io/bioclip-2/
+- **Homepage:** [BioCLIP 2 Project Page](https://imageomics.github.io/bioclip-2/)
 - **Repository:** [BioCLIP 2](https://github.com/Imageomics/bioclip-2)
 - **Paper:** [BioCLIP 2: Emergent Properties from Scaling Hierarchical Contrastive Learning](https://doi.org/10.48550/arXiv.2505.23883)
 - **Demo:** [BioCLIP 2 Demo](https://huggingface.co/spaces/imageomics/bioclip-2-demo)
@@ -110,7 +110,7 @@ tokenizer = open_clip.get_tokenizer('hf-hub:imageomics/bioclip-2')
 
 ### Training Data
 
-The model was trained with [TreeOfLife-200M](https://huggingface.co/datasets/imageomics/TreeOfLife-200M).
+The model was trained with [TreeOfLife-200M](https://huggingface.co/datasets/imageomics/TreeOfLife-200M) (Revision [a8f38b4](http://huggingface.co/datasets/imageomics/TreeOfLife-200M/tree/a8f38b4388579862c56ae57d6f094c2ac0e92e12)).
 The dataset consists of nearly 214M images covering 952K taxa. 
 The scale of TreeOfLife-200M fosters the emergent properties of BioCLIP 2.