Add RTDs badge in README.md #106

README.md

@@ -4,6 +4,7 @@ Set of common codes used in metallicity studies that use the stacking techniques
 [![GitHub Workflow Status (master)](https://img.shields.io/github/workflow/status/astrochun/Metallicity_Stack_Commons/Python%20package/master?color=blue&label=build%20%28master%29&logo=github)](https://github.com/astrochun/Metallicity_Stack_Commons/actions?query=workflow%3A%22Python+package%22+branch%3Amaster)
 [![GitHub Workflow Status](https://img.shields.io/github/workflow/status/astrochun/Metallicity_Stack_Commons/Python%20package?color=blue&label=build%20%28latest%29&logo=github)](https://github.com/astrochun/Metallicity_Stack_Commons/actions?query=workflow%3A%22Python+package%22)
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+[![Read the Docs](https://img.shields.io/readthedocs/metallicity-stack-commons?color=blue&label=RTDs)](https://readthedocs.org/projects/metallicity-stack-commons/builds/)
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