Revert sensors demo camera format change

[iche033]

Signed-off-by: Ian Chen [email protected]

🦟 Bug fix

Summary

Reverts an unintended change accidentally made in #1454 (91d77a5), that updates a camera's format in sensors_demo.sdf world. This PR reverts that format change.

Checklist

• Signed all commits for DCO
• Added tests
• Updated documentation (as needed)
• Updated migration guide (as needed)
• Consider updating Python bindings (if the library has them)
• codecheck passed (See contributing)
• All tests passed (See test coverage)
• While waiting for a review on your PR, please help review another open pull request to support the maintainers

Note to maintainers: Remember to use Squash-Merge and edit the commit message to match the pull request summary while retaining Signed-off-by messages.

[codecov]

Codecov Report

Merging #1468 (639c14c) into ign-gazebo6 (3b0f911) will not change coverage.
The diff coverage is n/a.

❗ Current head 639c14c differs from pull request most recent head 48c5f3d. Consider uploading reports for the commit 48c5f3d to get more accurate results

@@             Coverage Diff              @@
##           ign-gazebo6    #1468   +/-   ##
============================================
  Coverage        33.58%   33.58%           
============================================
  Files               44       44           
  Lines             2260     2260           
============================================
  Hits               759      759           
  Misses            1501     1501           

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