chore(*) update CHANGELOG.md for kuma 1.2.2

[bartsmykla]

Summary

Update the changelog for the latest release of kuma (1.2.2)

Full changelog

• [Implement ...]
• [Fix ...]

Issues resolved

Fix #XXX

Documentation

• Link to the website documentation PR

Testing

• Unit tests
• E2E tests
• Manual testing on Universal
• Manual testing on Kubernetes

Backwards compatibility

• Add backport-to-stable label if the code is backwards compatible. Otherwise, list breaking changes.

[codecov-commenter]

Codecov Report

Merging #2370 (d967fd9) into master (b0c72d1) will increase coverage by 0.41%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #2370      +/-   ##
==========================================
+ Coverage   52.13%   52.55%   +0.41%     
==========================================
  Files         874      878       +4     
  Lines       47826    47867      +41     
==========================================
+ Hits        24936    25158     +222     
+ Misses      20865    20660     -205     
- Partials     2025     2049      +24     

Impacted Files	Coverage Δ
api/internal/util/proto/types.go	100.00% <0.00%> (ø)
...kg/plugins/resources/k8s/native/pkg/test/within.go	100.00% <0.00%> (ø)
...k8s/native/controllers/proxytemplate_controller.go	0.00% <0.00%> (ø)
api/internal/util/proto/proto.go	70.00% <0.00%> (ø)
api/observability/v1/mads.pb.go	35.56% <0.00%> (+1.03%)	⬆️
pkg/xds/generator/direct_access_proxy_generator.go	83.90% <0.00%> (+1.14%)	⬆️
api/mesh/v1alpha1/dataplane_helpers.go	80.16% <0.00%> (+1.68%)	⬆️
pkg/mads/v1/client/client.go	43.75% <0.00%> (+2.50%)	⬆️
pkg/plugins/resources/memory/store.go	82.06% <0.00%> (+4.34%)	⬆️
api/mesh/v1alpha1/dataplane_insight_helpers.go	83.33% <0.00%> (+5.20%)	⬆️
... and 8 more

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