Update Static Root README

[scottbell]

Summary

The Static Root README doesn't reflect the current codebase and would cause an undefined error as it tries to access an option not listed in the documentation.

Expected vs Current Behavior

The configuration should look like so:

openmct.install(openmct.plugins.StaticRootPlugin({ namespace: 'root', exportUrl: './static-object-config.json' }));

Note the exportURL and the named object arguments instead of ordered arguments.

Impact Check List

• Data loss or misrepresented data?
• Regression? Did this used to work or has it always been broken?
• Is there a workaround available?
• Does this impact a critical component?
• Is this just a visual bug with no functional impact?
• Does this block the execution of e2e tests?
• Does this have an impact on Performance?