Describe the bug
A clear and concise description of what the bug is.

Due to the transformation of the empty and "public" namespaces on the server side, when the client's namespace is empty, the namespace in the ConfigChangeNotifyRequest does not match the client's namespace. As a result, the client is unable to receive configuration change notifications.

Expected behavior
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Actually behavior
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How to Reproduce
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1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See errors

Desktop (please complete the following information):

• OS: [e.g. Centos]
• Version [e.g. nacos-server 1.3.1, nacos-client 1.3.1]
• Module [e.g. naming/config]
• SDK [e.g. original, spring-cloud-alibaba-nacos, dubbo]

Additional context
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