chore: Mark project as active. (open-feature#167)

Mark project as active.

Signed-off-by: Justin Abrahms <jabrahms@ebay.com>

Signed-off-by: Justin Abrahms <jabrahms@ebay.com>
Signed-off-by: Bhandari, Pramesh(AWF) <pabhandari@ebay.com>

README.md

@@ -2,7 +2,7 @@
 
 [![Maven Central](https://maven-badges.herokuapp.com/maven-central/dev.openfeature/sdk/badge.svg)](https://maven-badges.herokuapp.com/maven-central/dev.openfeature/sdk)
 [![javadoc](https://javadoc.io/badge2/dev.openfeature/sdk/javadoc.svg)](https://javadoc.io/doc/dev.openfeature/sdk) 
-[![Project Status: WIP – Initial development is in progress, but there has not yet been a stable, usable release suitable for the public.](https://www.repostatus.org/badges/latest/wip.svg)](https://www.repostatus.org/#wip)
+[![Project Status: Active – The project has reached a stable, usable state and is being actively developed.](https://www.repostatus.org/badges/latest/active.svg)](https://www.repostatus.org/#active)
 [![v0.5.1](https://img.shields.io/static/v1?label=Specification&message=v0.5.1&color=yellow)](https://github.com/open-feature/spec/tree/v0.5.1)
 [![Known Vulnerabilities](https://snyk.io/test/github/open-feature/java-sdk/badge.svg)](https://snyk.io/test/github/open-feature/java-sdk)
 [![on-merge](https://github.com/open-feature/java-sdk/actions/workflows/merge.yml/badge.svg)](https://github.com/open-feature/java-sdk/actions/workflows/merge.yml)