Update v8.1.3 changelog [skip e2e] (#9747)

The changelog has been updated with one minor UX improvement, and the
entry regarding failed swap fetches has been updated to point at the PR
that actually fixed the issue.

CHANGELOG.md

@@ -15,10 +15,11 @@
 - [#9671](https://github.com/MetaMask/metamask-extension/pull/9671): Prevent old fetches from polluting the swap state
 - [#9702](https://github.com/MetaMask/metamask-extension/pull/9702): Keyboard navigation for swaps dropdowns
 - [#9646](https://github.com/MetaMask/metamask-extension/pull/9646): Switch from Matomo to Segment
-- [#9726](https://github.com/MetaMask/metamask-extension/pull/9726): Fix fetching of swap quotes when initial network was testnet
+- [#9745](https://github.com/MetaMask/metamask-extension/pull/9745): Fix fetching swaps when initial network not Mainnet
 - [#9621](https://github.com/MetaMask/metamask-extension/pull/9621): Include aggregator fee as part of displayed network fees
 - [#9736](https://github.com/MetaMask/metamask-extension/pull/9736): Bump eth-contract-metadata from 1.16.0 to 1.17.0
 - [#9743](https://github.com/MetaMask/metamask-extension/pull/9743): Fix "+-" prefix on swap token amount
+- [#9715](https://github.com/MetaMask/metamask-extension/pull/9715): Focus on wallet address in buy workflow
 
 ## 8.1.2 Mon Oct 19 2020
 - [#9608](https://github.com/MetaMask/metamask-extension/pull/9608): Ensure QR code scanner works