chore(deps): update dependency yamlfmt to v0.20.0

Author: renovate[bot]

mise.toml

@@ -11,7 +11,7 @@ ghalint = "1.5.3"
 pinact = "3.4.2"
 zizmor = "1.12.1"
 taplo = "0.10.0"
-yamlfmt = "0.19.0"
+yamlfmt = "0.20.0"
 # required for pipx backend
 uv = "0.9.5"
 yamllint = "1.37.1"