fix typo in server.mdx

[rohitkhatana]

fixed the example typo for running server. and added detail example for uv command

Motivation and Context

1. Current server launch example command did not work and can confuse the developers who is trying to setup a MCP server.
2. Given example for uv command in MCP server will not work for most the developers, so adding exact example how to add command to configure the weather server.

How Has This Been Tested?

I have tested this there is minor typo for launch command example. and adding more detailed examples to setup the uv command

Breaking Changes

No breaking changes

Types of changes

• [ x] Documentation update

Checklist

• I have read the MCP Documentation
• My code follows the repository's style guidelines
• New and existing tests pass locally
• I have added appropriate error handling
• [x ] I have added or updated documentation as needed