Tweak "Keywords (C++)" topic

[Rageking8]

• Normalize single space before sup elements to keep things uniform
• Nits:
  • "Inline assembly" should not have capital "I"
  • Remove unnecessary escapes for /Za link text
  • Add backticks for __declspec in subheading

[prmerger-automator[bot]]

@Rageking8 : Thanks for your contribution! The author(s) and reviewer(s) have been notified to review your proposed change.

[learn-build-service-prod[bot]]

Learn Build status updates of commit 743d5b4:

:white_check_mark: Validation status: passed

File	Status	Preview URL	Details
docs/cpp/keywords-cpp.md	:white_check_mark:Succeeded

For more details, please refer to the build report.

[ttorble]

@TylerMSFT

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

[Court72]

@TylerMSFT - Editorial changes LGTM.