[deps] BRE: Update mysql Docker tag to v8.3

[renovate]

This PR contains the following updates:

Package	Update	Change	Pending
mysql	minor	8.0 → 8.3	8.4

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[bitwarden-bot]

Internal tracking:

• ID: PM-30028
• Link: https://bitwarden.atlassian.net/browse/PM-30028

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 54.96%. Comparing base (2026ca1) to head (10a70f6).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6763      +/-   ##
==========================================
- Coverage   54.96%   54.96%   -0.01%     
==========================================
  Files        1930     1930              
  Lines       85507    85507              
  Branches     7654     7654              
==========================================
- Hits        47003    47002       -1     
- Misses      36717    36718       +1     
  Partials     1787     1787              

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[aj-bw]

since this is just the dev resource, I assume this does not need full QA testing? cc @bitwarden/team-platform-dev