phishing-controller owned by product-safety (#4554)

## Explanation

Added product-safety to own phishing-controller package

## Checklist

- [ ] I've updated the test suite for new or updated code as appropriate
- [ ] I've updated documentation (JSDoc, Markdown, etc.) for new or
updated code as appropriate
- [ ] I've highlighted breaking changes using the "BREAKING" category
above as appropriate

---------

Co-authored-by: Mark Stacey <markjstacey@gmail.com>

.github/CODEOWNERS

@@ -13,3 +13,5 @@
 /packages/name-controller            @MetaMask/confirmations
 /packages/signature-controller       @MetaMask/confirmations
 /packages/transaction-controller     @MetaMask/confirmations
+
+/packages/phishing-controller        @MetaMask/product-safety