build(deps): Bump androidBillingClient from 6.2.0 to 6.2.1 (#274)

Bumps `androidBillingClient` from 6.2.0 to 6.2.1.

Updates `com.android.billingclient:billing` from 6.2.0 to 6.2.1

Updates `com.android.billingclient:billing-ktx` from 6.2.0 to 6.2.1

---
updated-dependencies:
- dependency-name: com.android.billingclient:billing
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: com.android.billingclient:billing-ktx
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

gradle/libs.versions.toml

@@ -13,7 +13,7 @@ appVersionName = "1.0.0"
 appVersionCode = "5"
 # https://github.com/google/accompanist
 accompanist = "0.34.0"
-androidBillingClient = "6.2.0"
+androidBillingClient = "6.2.1"
 # https://mvnrepository.com/artifact/com.android.tools/desugar_jdk_libs
 androidDesugar = "2.0.4"
 # https://mvnrepository.com/artifact/com.android.tools.build/gradle?repo=google