Change CamelCase to UpperCamelCase

Brings the terminology in line with the rest of the project, see
<https://github.com/rust-lang/rfcs/pull/2389>.

Connects to #2194.

ci/dictionary.txt

@@ -546,6 +546,7 @@ unsafety
 unsized
 unsynchronized
 Unyank
+UpperCamelCase
 URIs
 UsefulType
 username

src/ch10-01-syntax.md

@@ -33,9 +33,9 @@ the duplication by introducing a generic type parameter in a single function.
 To parameterize the types in a new single function, we need to name the type
 parameter, just as we do for the value parameters to a function. You can use
 any identifier as a type parameter name. But we’ll use `T` because, by
-convention, type parameter names in Rust are short, often just a letter, and Rust’s
-type-naming convention is CamelCase. Short for “type,” `T` is the default
-choice of most Rust programmers.
+convention, type parameter names in Rust are short, often just a letter, and
+Rust’s type-naming convention is UpperCamelCase. Short for “type,” `T` is the
+default choice of most Rust programmers.
 
 When we use a parameter in the body of the function, we have to declare the
 parameter name in the signature so the compiler knows what that name means.