Fix metric unit in BufferPoolsTest
@@ -102,7 +102,7 @@ public class BufferPoolsTest {
assertThat(metricData)
.hasInstrumentationScope(EXPECTED_SCOPE)
.hasDescription("The number of buffers in the pool")
- .hasUnit("buffers")
+ .hasUnit("{buffers}")
.hasLongSumSatisfying(
sum ->
sum.hasPointsSatisfying(
