Fix chapter title and use consistent capitalization

We generally use sentence case for chapter titles.

Author: ehuss

src/SUMMARY.md

@@ -49,8 +49,8 @@
   - [Cargo: Table and key name consistency](rust-2024/cargo-table-key-names.md)
   - [Cargo: Reject unused inherited default-features](rust-2024/cargo-inherited-default-features.md)
   - [Rustfmt: Combine all delimited exprs as last argument](rust-2024/rustfmt-overflow-delimited-expr.md)
+  - [Rustfmt: Style edition](rust-2024/rustfmt-style-edition.md)
   - [Rustfmt: Raw identifier sorting](rust-2024/rustfmt-raw-identifier-sorting.md)
-  - [Rustfmt: Style Edition](rust-2024/rustfmt-style-edition.md)
   - [Rustfmt: Version sorting](rust-2024/rustfmt-version-sorting.md)
   - [`gen` keyword](rust-2024/gen-keyword.md)
   - [Macro fragment specifiers](rust-2024/macro-fragment-specifiers.md)

src/rust-2024/rustfmt-style-edition.md

@@ -1,4 +1,4 @@
-# Rustfmt: Style Edition
+# Rustfmt: Style edition
 
 🚧 The 2024 Edition has not yet been released and hence this section is still "under construction".
 

src/rust-2024/rustfmt-version-sorting.md

@@ -1,4 +1,4 @@
-# Rustfmt: Raw identifier sorting
+# Rustfmt: Version sorting
 
 🚧 The 2024 Edition has not yet been released and hence this section is still "under construction".