Add missing pin image to note

[martinstacey]

Purpose

This PR is made to address a bug DYN-4186: Pin icon missing from pinned note.

The reason that the icon was missing was because it was mistakenly erased in the following PR:
#12072

Declarations

Check these if you believe they are true

• The codebase is in a better state after this PR
• Is documented according to the standards
• The level of testing this PR includes is appropriate
• User facing strings, if any, are extracted into *.resx files
• All tests pass using the self-service CI.
• Snapshot of UI changes, if any.
• Changes to the API follow Semantic Versioning and are documented in the API Changes document.
• This PR modifies some build requirements and the readme is updated

Reviewers

@QilongTang

FYIs

@SHKnudsen @M-JULIANI