chore(deps): bump go.opentelemetry.io/contrib/instrumentation/github.com/gorilla/mux/otelmux from 0.54.0 to 0.56.0

chore(deps): bump go.opentelemetry.io/contrib/instrumentation/github.com/gorilla/mux/otelmux from 0.54.0 to 0.56.0 #368