Fix synchronous translation code sample error.

[k-in]

This pull request includes changes to the sample_single_document_translation function in the articles/ai-services/translator/document-translation/quickstarts/includes/sdk/python.md file. The changes improve the handling of file paths and the saving of the translated document.

Improvements to file handling:

• Corrected the method used to obtain the file name from the file path by changing os.path.path.basename to os.path.basename.
• Changed the file opening mode from "r" (read) to "rb" (read binary) to correctly read the contents of the document.

Enhancements to translation response handling:

• Modified the code to save the translated document to a file instead of decoding and printing the response stream. This includes writing the response stream to a new file named translated-document.docx.Synchronous translation code sample for python is run in error. Propose to fix those errors.

[prmerger-automator]

@k-in : Thanks for your contribution! The author(s) have been notified to review your proposed change.

[learn-build-service-prod]

Learn Build status updates of commit da0171b:

✅ Validation status: passed

File	Status	Preview URL	Details
articles/ai-services/translator/document-translation/quickstarts/includes/sdk/python.md	✅Succeeded

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[v-dirichards]

@laujan

Can you review the proposed changes?

Important: When the changes are ready for publication, adding a #sign-off comment is the best way to signal that the PR is ready for the review team to merge.

#label:"aq-pr-triaged"
@MicrosoftDocs/public-repo-pr-review-team

[learn-build-service-prod]

Learn Build status updates of commit da0171b:

✅ Validation status: passed

File	Status	Preview URL	Details
articles/ai-services/translator/document-translation/quickstarts/includes/sdk/python.md	✅Succeeded

For more details, please refer to the build report.

For any questions, please:

• Try searching the learn.microsoft.com contributor guides
• Post your question in the Learn support channel