Fix quantum teleportation example to use explicit Pauli gate

[guan404ming]

Purpose of PR

Fix the quantum teleportation example to use the correct method names for Pauli gates. The example was using incorrect method names (apply_x_gate and apply_z_gate) instead of the existing API methods (apply_pauli_x_gate and apply_pauli_z_gate).

Linked Issues

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Changes Made

• Bug fix
• New feature
• Documentation update

Important ToDos

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A GitHub issue exists (if not, please create one) [https://github.com/apache/mahout/issues]

• Title of PR is "Issue #XXXX: Brief Description of Changes" where XXXX is the GitHub issue number.
• Created unit tests where appropriate
• Added correct licenses on newly added files
• Assigned GitHub issue to self
• Added documentation in ScalaDocs/JavaDocs and to the website
• Successfully built and ran all unit tests, verified that all tests pass locally

If all of these items are not yet complete, but you still feel it is appropriate to open a PR, please open it as a Draft PR instead.
Once all requirements are met, you can mark it as ready for review.

Breaking Changes

Does this PR introduce a breaking change?

• Yes
• No

Testing & Verification

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• Unit tests added
• Manually tested

Checklist

• The title follows the format "MAHOUT-XXXX Brief Description"
• GitHub issue is created
• Code follows ASF guidelines

[rawkintrevo]

Thanks @guan404ming sorry for slow tern around