[docs] Updated link to the ease visualizer in the docs

[tylerlwsmith]

The docs had a broken link, pointing to /examples#easing instead of /examples/easing.

Before submitting the PR, please make sure you do the following

• It's really useful if your PR references an issue where it is discussed ahead of time. In many cases, features are absent for a reason. For large changes, please create an RFC: https://github.com/sveltejs/rfcs
• Prefix your PR title with [feat], [fix], [chore], or [docs].
• This message body should clearly illustrate what problems it solves.
• Ideally, include a test that fails without this PR but passes with it.

Tests

• Run the tests with npm test and lint the project with npm run lint

[ignatiusmb]

Nice catch! Can you also update this while we're at it?

svelte/site/content/blog/2021-03-01-whats-new-in-svelte-march-2021.md

Line 13 in f73dc07

* SSR store handling has been reworked to subscribe and unsubscribe as in DOM mode. SSR stores should work much more consistently now (**3.31.2**, see [custom stores](https://svelte.dev/examples#custom-stores) and [Server-side component API ](https://svelte.dev/docs#run-time-server-side-component-api))

That should cover all links to examples

[tylerlwsmith]

Yep, done!