Update repology badge

README.md

@@ -6,9 +6,9 @@ https://github.com/wgunderwood/tex-fmt/actions/workflows/ci.yml)
 [![crates.io](
 https://img.shields.io/crates/v/tex-fmt?logo=rust)](
 https://crates.io/crates/tex-fmt)
-[![AUR Version](
-https://img.shields.io/aur/version/tex-fmt?logo=archlinux&label=AUR)](
-https://aur.archlinux.org/packages/tex-fmt)
+[![Packaging status](
+https://repology.org/badge/tiny-repos/tex-fmt.svg)](
+https://repology.org/project/tex-fmt/versions)
 [![license: MIT](
 https://shields.io/badge/license-MIT-blue.svg)](
 https://mit-license.org/)