Align titles and icons in Security pages

What does this MR do?

This fixes titles and icons alignment in some Security pages where the ? icons were aligned with the bottom of titles, when they should be center-aligned.

Affected pages are:

• Dependency List
• License Compliance
• Threat Monitoring

Screenshots (strongly suggested)

Dependency List

Before	After

License Compliance

Before	After

Threat Monitoring

Before	After

Does this MR meet the acceptance criteria?

Conformity

• I have included a changelog entry, or it's not needed. (Does this MR need a changelog?)
• I have added/updated documentation, or it's not needed. (Is documentation required?)
• I have properly separated EE content from FOSS, or this MR is FOSS only. (Where should EE code go?)
• I have added information for database reviewers in the MR description, or it's not needed. (Does this MR have database related changes?)
• I have self-reviewed this MR per code review guidelines.
• This MR does not harm performance, or I have asked a reviewer to help assess the performance impact. (Merge request performance guidelines)
• I have followed the style guides.

Related to #332269 (closed)