update latest wallet-core prebuilt submodule - merchant - Merchant backend to process payments, run by merchants

commit b82248dafbde1536bdfe4fdeb37d46fa4954403e
parent 7d1be63d6166e42dea8b52c4b65c4690a271eda2
Author: Sebastian <sebasjm@taler-systems.com>
Date:   Fri, 10 Apr 2026 08:44:20 -0300

update latest wallet-core prebuilt submodule

	merchant Merchant backend to process payments, run by merchants
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