chore(doc): rename Studio doc to Observability & Studio with OpenTelemetry tracing guide#1186

chickenlj merged 1 commit intoagentscope-ai:mainagentscope-ai/agentscope-java:mainfrom

LearningGp:fix/doc-otLearningGp/agentscope-java:fix/doc-otCopy head branch name to clipboard