Use correct device feature in multi draw indirect sample documentation

[SaschaWillems]

Description

This PR fixes the documentation for the multi draw indirect sample to check for the correct device feature (multiDrawIndirect instead of bufferDeviceAddress).

Note: Documentation only PR, no code changes.

Fixes #1266

General Checklist:

Please ensure the following points are checked:

• My code follows the coding style
• I have reviewed file licenses
• I have commented any added functions (in line with Doxygen)
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• My changes do not add any new compiler warnings
• My changes do not add any new validation layer errors or warnings
• I have used existing framework/helper functions where possible
• My changes do not add any regressions
• I have tested every sample to ensure everything runs correctly
• This PR describes the scope and expected impact of the changes I am making

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