Merge pull request #1305 from microwavables/add-cii-badge

add cii badge to readme.md

Author: Nanci Lancaster

README.md

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 ![logo](docs/CarvelLogo.png)
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+[![OpenSSF Best Practices](https://bestpractices.coreinfrastructure.org/projects/7746/badge)](https://bestpractices.coreinfrastructure.org/projects/7746)
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 # kapp-controller
 
 Kubernetes native continuous delivery and package management experience through custom resource definitions.