chore(master): release 1.21.2

[yordis]

An automated release has been created for you.

1.21.2 (2026-08-19)

Bug Fixes

• form-urlencoded: Do not claim a content-type it did not encode (#914) (b250b50)

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[cursor]

PR Summary

Low Risk
Version and documentation-only changes with no runtime code in the diff; low risk for consumers upgrading the published patch.

Overview
Release 1.21.2 bumps the package version from 1.21.1 to 1.21.2 across mix.exs, the Release Please manifest, README install snippet, and CHANGELOG.

The release notes document one bug fix shipped in this version: Tesla.Middleware.FormUrlencoded no longer sets a Content-Type header for bodies it does not actually URL-encode (#914). This PR does not include that library change—only the automated version and changelog updates for publishing.

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[yordis]

🤖 Created releases:

• v1.21.2

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