chore(deps): update mwader/static-ffmpeg docker tag to v8.1.2

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
mwader/static-ffmpeg	stage	patch	8.1.1 → 8.1.2

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[github-actions]

Hadolint: success

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 61.05%. Comparing base (c843f39) to head (1a933d7).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1842   +/-   ##
=======================================
  Coverage   61.05%   61.05%           
=======================================
  Files          89       89           
  Lines        1361     1361           
  Branches      215      215           
=======================================
  Hits          831      831           
  Misses        381      381           
  Partials      149      149           

Flag	Coverage Δ
unittests	61.05% <ø> (ø)

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