[Issue] Fix typo in MIME type of JPEG images

[m2-assistant]

This issue is automatically created based on existing pull request: #33514: Fix typo in MIME type of JPEG images

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Description (*)

There's no MIME type image/jpg, only image/jpeg regardless of whether a file extension is *.jpeg or *.jpg.

Manual testing scenarios (*)

1. Log in to the admin panel
2. Open Content > Pages/Blocks
3. Edit any Page/Block
4. Expand Content
5. Click Insert Image...
6. Click Upload Images > Choose Files...
7. Select a *.jpg image

Contribution checklist (*)

• Pull request has a meaningful description of its purpose
• All commits are accompanied by meaningful commit messages
• All new or changed code is covered with unit/integration tests (if applicable)
• README.md files for modified modules are updated and included in the pull request if any README.md predefined sections require an update
• All automated tests passed successfully (all builds are green)

[github-jira-sync-bot]

✅ Jira issue https://jira.corp.adobe.com/browse/AC-8157 is successfully created for this GitHub issue.

[m2-assistant]

✅ Confirmed by @engcom-Lima. Thank you for verifying the issue.
Issue Available: @engcom-Lima, You will be automatically unassigned. Contributors/Maintainers can claim this issue to continue. To reclaim and continue work, reassign the ticket to yourself.