docs(readme): fixed typo
Pulumi is a cloud development platform that makes creating cloud programs easy and productive.
-Author cloud programs in your favorite favorite language and Pulumi will automatically keep your
+Author cloud programs in your favorite language and Pulumi will automatically keep your
infrastructure up-to-date. Skip the YAML and just write code. Pulumi is multi-language, multi-cloud
and fully extensible in both its engine and ecosystem of packages.
