Update path to vulkan_samples.app in MacOS

[chmosquera]

Description

Adjusted the instructions for building to MacOS by correcting the folder name where the application is built to.

Since the change is a minor instructional update, I did not do any code or build checks. However, I did verify that the command does what's expected: call the application --help command.

General Checklist:

Please ensure the following points are checked:

• [x] My code follows the coding style
• [x] I have reviewed file licenses
• [x] I have commented any added functions (in line with Doxygen)
• [x] I have commented any code that could be hard to understand
• [x] My changes do not add any new compiler warnings
• [x] My changes do not add any new validation layer errors or warnings
• [x] I have used existing framework/helper functions where possible
• [x] My changes do not add any regressions
• [x] I have tested every sample to ensure everything runs correctly

• [x] This PR describes the scope and expected impact of the changes I am making

  Note: The Samples CI runs a number of checks including:

  • [ ] I have updated the header Copyright to reflect the current year (CI build will fail if Copyright is out of date)
  • [ ] My changes build on Windows, Linux, macOS and Android. Otherwise I have documented any exceptions

  If this PR contains framework changes:

  • [ ] I did a full batch run using the batch command line argument to make sure all samples still work properly

Sample Checklist

If your PR contains a new or modified sample, these further checks must be carried out in addition to the General Checklist:

• [ ] I have tested the sample on at least one compliant Vulkan implementation
• [ ] If the sample is vendor-specific, I have tagged it appropriately
• [ ] I have stated on what implementation the sample has been tested so that others can test on different implementations and platforms
• [ ] Any dependent assets have been merged and published in downstream modules
• [ ] For new samples, I have added a paragraph with a summary to the appropriate chapter in the readme of the folder that the sample belongs to e.g. api samples readme
• [ ] For new samples, I have added a tutorial README.md file to guide users through what they need to know to implement code using this feature. For example, see conditional_rendering
• [ ] For new samples, I have added a link to the Antora navigation so that the sample will be listed at the Vulkan documentation site

[CLAassistant]

All committers have signed the CLA.

[SRSaunders]

See item 7 in pending pull request #1084. I am proposing to revert to a macOS command line app vs. an app bundle since it is not required for this project (other than for iOS). In addition, this PR also contains a change to the docs (https://github.com/KhronosGroup/Vulkan-Samples/pull/1084/commits/53212364e2acf98d9a5732b84533325d8890b2af) for <arm64|x86_64> path options.

[chmosquera]

Thanks for letting me know! In that case, we can probably close this PR. It seems like with the two PRs mentioned above, this change won't be needed.

[SRSaunders]

Thanks for reviewing and looking into this.