bump linkchecker to edition 2024

pietroalbini · pietroalbini · commit 984d448e683a · 2025-07-13T12:42:25.000+02:00
diff --git a/src/tools/linkchecker/Cargo.toml b/src/tools/linkchecker/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "linkchecker"
 version = "0.1.0"
-edition = "2021"
+edition = "2024"
 
 [[bin]]
 name = "linkchecker"
