Update README.md

update downloads badge

Author: jonhealy1

README.md

@@ -6,7 +6,7 @@
   <img src="https://raw.githubusercontent.com/stac-utils/stac-validator/main/assets/stac-validator.png" width=560>
 </p>
 
-[![PyPI Downloads](https://static.pepy.tech/badge/stac-validator/month)](https://pepy.tech/projects/stac-validator)
+[![PyPI Downloads](https://static.pepy.tech/personalized-badge/stac-validator?period=total&units=NONE&left_color=GREY&right_color=BLUE&left_text=downloads)](https://pepy.tech/projects/stac-validator)
   [![GitHub contributors](https://img.shields.io/github/contributors/stac-utils/stac-validator?color=blue)](https://github.com/stac-utils/stac-validator/graphs/contributors)
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