MicrometerDoubleCounterTest is sporadically failing

[trask]

https://github.com/open-telemetry/opentelemetry-java-contrib/actions/runs/12473971011/job/34815301925?pr=1622

(the reason this didn't show up before is because we used to auto-retry tests)

MicrometerDoubleCounterTest > observableWithAttributes() FAILED
    org.opentest4j.AssertionFailedError: 
    expected: 18.015547904759003
     but was: 20.0
        at app//io.opentelemetry.contrib.metrics.micrometer.internal.instruments.MicrometerDoubleCounterTest.observableWithAttributes(MicrometerDoubleCounterTest.java:333)