Update Rust to v1.88.0 (#523)

mlafeldt · web-flow · commit 533b30e87f90 · 2025-06-27T11:26:23.000+02:00
https://blog.rust-lang.org/2025/06/26/Rust-1.88.0/
diff --git a/rust-toolchain.toml b/rust-toolchain.toml
@@ -1,3 +1,3 @@
 [toolchain]
-channel = "1.87"
+channel = "1.88"
 components = ["rustfmt", "clippy"]
