Update datasets/index.md

Co-authored-by: Josh Moore <josh@openmicroscopy.org>

Author: sanketverma1704

datasets/index.md

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-Zarr is <a href="https://zarr.dev/adopters/">adopted</a> by a variety of
+Zarr has been <a href="https://zarr.dev/adopters/">adopted</a> by a variety of
 research groups, universities, organisations, and open-source communities.<br>
 
 Below is a list of a few examples of public datasets.<br><br>