Fix casing in table of contents

Author: GearsDatapacks

blog/bit-array-syntax.md

@@ -19,9 +19,9 @@ comprehensive guide, to make it as easy as possible to understand how they work.
 - [Segment types](#segment-types)
 - [Segment size](#segment-size)
 - [Endianness](#endianness)
-- [Pattern Matching](#pattern-matching)
+- [Pattern matching](#pattern-matching)
   - [Strings](#strings)
-  - [Bits and Bytes](#bits-and-bytes)
+  - [Bits and bytes](#bits-and-bytes)
   - [Signedness](#signedness)
 - [JavaScript support](#javascript-support)
 - [Example](#example)