Update Screenshots on Security & Compliance Carousel

What does this MR do?

This MR updates the Screenshots on the Security and Compliance Carousel to fix this Issue. I replaced them before in this MR. But with the wrong screens, Link. This MR fixes that.

@beckalippert Here is what I've done with the Screens you provided here #241377 (comment 434017582)

• optimized file-size by 68% 133kb in total using this Tool. The Compression is lossy but on images like these it works really well, I can't tell a difference. See comparison Screenshot attached.

Screenshots (strongly suggested)

Demo video of carousel

slide-optimization

Does this MR meet the acceptance criteria?

Conformity

• Changelog entry
• [-] Documentation (if required)
• [-] Code review guidelines
• [-] Merge request performance guidelines
• [-] Style guides
• [-] Database guides
• [-] Separation of EE specific content

Availability and Testing

• [-] Review and add/update tests for this feature/bug. Consider all test levels. See the Test Planning Process.
• [-] Tested in all supported browsers
• [-] Informed Infrastructure department of a default or new setting change, if applicable per definition of done

Security

If this MR contains changes to processing or storing of credentials or tokens, authorization and authentication methods and other items described in the security review guidelines:

• [-] Label as security and @ mention @gitlab-com/gl-security/appsec
• [-] The MR includes necessary changes to maintain consistency between UI, API, email, or other methods
• [-] Security reports checked/validated by a reviewer from the AppSec team