fix(deps): update dependency com.android.billingclient:billing to v5.2.1

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
com.android.billingclient:billing	5.1.0 -> 5.2.1

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[codecov[bot]]

Codecov Report

Merging #437 (91ee717) into main (980cbc8) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #437   +/-   ##
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  Coverage   47.69%   47.69%           
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  Files           4        4           
  Lines         478      478           
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  Hits          228      228           
  Misses        250      250