Ignore buggy collapsible_match clippy lint

https://github.com/rust-lang/rust-clippy/issues/7575

serde_derive/src/lib.rs

@@ -21,6 +21,8 @@
     // clippy false positive: https://github.com/rust-lang/rust-clippy/issues/7054
     clippy::branches_sharing_code,
     clippy::cognitive_complexity,
+    // clippy bug: https://github.com/rust-lang/rust-clippy/issues/7575
+    clippy::collapsible_match,
     clippy::enum_variant_names,
     // clippy bug: https://github.com/rust-lang/rust-clippy/issues/6797
     clippy::manual_map,

serde_derive_internals/lib.rs

@@ -4,6 +4,8 @@
 // Ignored clippy lints
 #![allow(
     clippy::cognitive_complexity,
+    // clippy bug: https://github.com/rust-lang/rust-clippy/issues/7575
+    clippy::collapsible_match,
     // clippy bug: https://github.com/rust-lang/rust-clippy/issues/6797
     clippy::manual_map,
     clippy::missing_panics_doc,