Update markdown tables

[TENIOS]

I "freshened up" the tables and fixed some, such as those that were too long and indented (contracts.md). Many tables have become more readable for documentation developers.

Please don't close the PR, I'm willing to fix or put some changes back in. I've done a lot of work and I don't want it to just disappear.

[taylorotwell]

I need before and after screenshots of the changes.

[TENIOS]

I need before and after screenshots of the changes.

What does it look like on the website?

[TENIOS]

I took screenshots of only those tables that have changed on the site. Those that have no changes, I did not take a screenshot because they contain changes only in Markdown.

Contracts

Before	After
{: width="50%"}	{: width="50%"}

Facades

Before	After
{: width="50%"}	{: width="50%"}

Logging

Before	After
{: width="50%"}	{: width="50%"}

Mail

Before	After
{: width="50%"}	{: width="50%"}

Migrations

Before	After
{: width="50%"}	{: width="50%"}

Notifications

Before	After
{: width="50%"}	{: width="50%"}

Scheduling

Before	After
{: width="50%"}	{: width="50%"}

Well. That was a long time coming.

(I know that {: width=“50%”} has no effect, but without them the right photo is always smaller.)

[TENIOS]

If you open each screenshot, you'll notice that dots have appeared at the end of sentences where they weren't, and also the unnecessary semicolon in Contracts after Illuminate\Contracts\Pipeline\Pipeline has been removed.

[TENIOS]

You can make sure that all tables are displayed correctly by use command in cloned laravel.com repository:

git clone --single-branch --branch "update-tables" https://github.com/TENIOS/docs "resources/docs/11.x"

[TENIOS]

I also noticed that some tables are missing div with class overflow-auto because of what on mobile devices the page is displayed incorrectly.

It's not due to my changes you can check it out at Contracts page in production.

[TENIOS]

@taylorotwell, thanks.