Docs: callouts have horribly low contrast

[patrickhlauke]

Prerequisites

• I have searched for duplicate or closed issues
• I have validated any HTML to avoid common problems
• I have read the contributing guidelines

Describe the issue

In the new docs, info and warning callouts have text colour contrast that's below minimum 4.5:1 threshold.

Info callout

Text: #087990
Background: #CFF4FC
Contrast: 4.34:1

---

Link: #0D6EFD
Background: #CFF4FC
Contrast: 3.86:1

---

Code: #D63384
Background: #CFF4FC
Contrast: 3.86:1

Warning callout

Text: #997404
Background: #FFF3CD
Contrast: 3.9:1

---

Link: #0D6EFD
Background: #FFF3CD
Contrast: 4.06:1

---

Code: #D63384
Background: #FFF3CD
Contrast: 4.06:1

Reduced test cases

https://getbootstrap.com/docs/5.3/components/popovers/

What operating system(s) are you seeing the problem on?

Windows

What browser(s) are you seeing the problem on?

Chrome

What version of Bootstrap are you using?

5.3

[mdo]

Overall colors and their links in default light mode are good now in main.

Pushing a PR to address the code color though, which will look like this:

[patrickhlauke]

lovely, thank you!