docs: avoid bold texts

Co-authored-by: James M Snell <jasnell@gmail.com>

Author: hemanth

doc/api/repl.md

@@ -242,13 +242,13 @@ added: REPLACEME
 When `useColors` is `true`, the REPL highlights
 JavaScript input using the following color scheme:
 
-* **Keywords** (`const`, `let`, `function`, `if`, `return`, etc.): Magenta
-* **Strings** (single-quoted, double-quoted, and template literals): Green
-* **Numbers**: Yellow
-* **Boolean literals** (`true`, `false`), `null`, `undefined`, `NaN`,
+* Keywords (`const`, `let`, `function`, `if`, `return`, etc.): Magenta
+* Strings (single-quoted, double-quoted, and template literals): Green
+* Numbers: Yellow
+* Boolean literals (`true`, `false`), `null`, `undefined`, `NaN`,
   `Infinity`: Yellow
-* **Regular expressions**: Red
-* **Comments** (line and block): Gray
+* Regular expressions: Red
+* Comments (line and block): Gray
 
 Syntax highlighting is applied only to the display; the internal `line`
 property remains plain text. Highlighting can be disabled by passing