chore(deps): update alpine docker tag to v3.21.2

[renovate-bot]

This PR contains the following updates:

Package	Type	Update	Change
alpine	final	patch	3.21.1 -> 3.21.2
alpine	stage	patch	3.21.1 -> 3.21.2

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.25%. Comparing base (38d050e) to head (22ab290).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #6512   +/-   ##
=======================================
  Coverage   96.25%   96.25%           
=======================================
  Files         372      372           
  Lines       21283    21283           
=======================================
  Hits        20486    20486           
  Misses        609      609           
  Partials      188      188           

Flag	Coverage Δ
badger_v1	10.67% <ø> (ø)
badger_v2	2.78% <ø> (ø)
cassandra-4.x-v1-manual	16.57% <ø> (ø)
cassandra-4.x-v2-auto	2.71% <ø> (ø)
cassandra-4.x-v2-manual	2.71% <ø> (ø)
cassandra-5.x-v1-manual	16.57% <ø> (ø)
cassandra-5.x-v2-auto	2.71% <ø> (ø)
cassandra-5.x-v2-manual	2.71% <ø> (ø)
elasticsearch-6.x-v1	20.24% <ø> (ø)
elasticsearch-7.x-v1	20.30% <ø> (-0.01%)	⬇️
elasticsearch-8.x-v1	20.46% <ø> (-0.01%)	⬇️
elasticsearch-8.x-v2	2.77% <ø> (-0.01%)	⬇️
grpc_v1	12.30% <ø> (-0.01%)	⬇️
grpc_v2	9.08% <ø> (ø)
kafka-3.x-v1	10.35% <ø> (ø)
kafka-3.x-v2	2.78% <ø> (ø)
memory_v2	2.78% <ø> (ø)
opensearch-1.x-v1	20.36% <ø> (+<0.01%)	⬆️
opensearch-2.x-v1	20.36% <ø> (ø)
opensearch-2.x-v2	2.78% <ø> (+<0.01%)	⬆️
tailsampling-processor	0.51% <ø> (ø)
unittests	95.13% <ø> (ø)

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