Bump go.opentelemetry.io/contrib/instrumentation/github.com/gin-gonic/gin/otelgin from 0.55.0 to 0.56.0 in /impl

Bump go.opentelemetry.io/contrib/instrumentation/github.com/gin-gonic/gin/otelgin from 0.55.0 to 0.56.0 in /impl #173