Update welcome.md

Author: canyon289

welcome.md

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 # Welcome
 
 Welcome to the online version
-[Bayesian Modeling and Computation in Python](https://www.routledge.com/Bayesian-Modeling-and-Computation-in-Python/Martin-Kumar-Lao/p/book/9780367894368). If you'd like a physical copy it can purchased 
-[from the publisher here](https://www.routledge.com/Bayesian-Modeling-and-Computation-in-Python/Martin-Kumar-Lao/p/book/9780367894368) or on Amazon.
+[Bayesian Modeling and Computation in Python]([https://www.routledge.com/Bayesian-Modeling-and-Computation-in-Python/Martin-Kumar-Lao/p/book/9780367894368](https://www.routledge.com/Bayesian-Modeling-and-Computation-in-Python/Martin-Kumar-Lao/p/book/9780367894368?utm_source=author&utm_medium=shared_link&utm_campaign=B043128_jm1_5ll_6rm_t081_1al_bayesianmodelingandcomputationinpythonauthorshare)). If you'd like a physical copy it can purchased 
+[from the publisher here]([https://www.routledge.com/Bayesian-Modeling-and-Computation-in-Python/Martin-Kumar-Lao/p/book/9780367894368](https://www.routledge.com/Bayesian-Modeling-and-Computation-in-Python/Martin-Kumar-Lao/p/book/9780367894368?utm_source=author&utm_medium=shared_link&utm_campaign=B043128_jm1_5ll_6rm_t081_1al_bayesianmodelingandcomputationinpythonauthorshare)) or on Amazon.
 <p align="center">
   <a href="https://www.amazon.com/Bayesian-Modeling-Computation-Chapman-Statistical/dp/036789436X?_encoding=UTF8&camp=1789&creative=9325&linkCode=ur2&tag=storypodca-20&linkId=2P4S6EY6B462X4AR" target="_blank" rel="noopener noreferrer" style="border:none;text-decoration:none"><img src="https://www.niftybuttons.com/amazon/amazon-button2.png"></a>