Fix TOC link

Signed-off-by: Alexander Rodin <rodin.alexander@gmail.com>

CONTRIBUTING.md

@@ -33,7 +33,7 @@ expanding into more specifics.
       - [Sink Healthchecks](#sink-healthchecks)
    - [Testing](#testing)
       - [Sample Logs](#sample-logs)
-      - [Tips & Tricks](#tips-and-tricks)
+      - [Tips and Tricks](#tips-and-tricks)
    - [Benchmarking](#benchmarking)
 - [Security](#security)
 - [Legal](#legal)
@@ -332,10 +332,10 @@ flog --bytes $((100 * 1024 * 1024)) > sample.log
 
 This will create a `100MiB` sample log file in the `sample.log` file.
 
-#### Tips & Tricks
+#### Tips and Tricks
 
 If you are developing a particular component and want to quickly iterate on unit
-$tests related only to this component, the following approach can reduce waiting times:
+tests related only to this component, the following approach can reduce waiting times:
 
 1. Install [cargo-watch](https://github.com/passcod/cargo-watch).
 2. (Only for GNU/Linux) Install LLVM 9 (for example, package `llvm-9` on Debian)