Remove `` from clap comments.

Rewrite a bit the comment of the replacement input argument.

src/main.rs

@@ -27,11 +27,11 @@ struct Args {
 
     /// Replacement pattern for the matched file names.
     ///
-    /// You can use `{1}`, `{2}`, etc. to reference the match groups in the pattern.
-    /// There are also the following tags available:
+    /// The following tags are available:
     /// * {full_name} - file name with extension
     /// * {name} - file name without extension
     /// * {ext} - extension
+    /// * {1}, {2}, etc. to reference the match groups in the search pattern.
     /// Example: "Season {1} Episode {2}.{ext}"
     #[arg(short = 'r', long, verbatim_doc_comment)]
     replacement: String,