message: Fix typo in README
  `@urql/exchange-suspense` -> `@urql/exchange-graphcache`
diff: @@ -41,9 +41,9 @@ known pieces of data. This cache also provides configurable APIs to:
  First install `@urql/exchange-graphcache` alongside `urql`:
  ```sh
  -yarn add @urql/exchange-suspense
  +yarn add @urql/exchange-graphcache
  # or
  -npm install --save @urql/exchange-suspense
  +npm install --save @urql/exchange-graphcache
  ```
  You'll then need to add the `cacheExchange`, that this package exposes, to your `urql` Client,
  