build(deps): update dependency aqua:google/yamlfmt to v0.21.0 (#6)

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.mise.toml

@@ -26,7 +26,7 @@ PIP_INDEX_URL = "{{ get_env(name='PIP_INDEX_URL', default='') }}"
 "ubi:rvben/rumdl" = "v0.0.221"
 "aqua:koalaman/shellcheck" = "v0.11.0"
 "aqua:mvdan/sh" = "v3.12.0"
-"aqua:google/yamlfmt" = "v0.20.0"
+"aqua:google/yamlfmt" = "v0.21.0"
 "aqua:hadolint/hadolint" = "v2.12.0"
 "pipx:reuse" = "6.2.0"
 "aqua:bats-core/bats-core" = "1.13.0"