Add SonarCloud to README
:microprofile-fault-tolerance: https://github.com/eclipse/microprofile-fault-tolerance/
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+image:https://sonarcloud.io/api/project_badges/measure?project=smallrye_smallrye-fault-tolerance&metric=alert_status["Quality Gate Status", link="https://sonarcloud.io/dashboard?id=smallrye_smallrye-fault-tolerance"]
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= SmallRye Fault Tolerance
