Fix and possibly automate the Commercial Support page

[jsilvela]

In the commercial support page we only list EDB, but there is also
a paragraph that says.

This list is provided in alphabetical order. If you want to add your company or yourself to this list, please open up a pull request for the CloudNativePG website.

The above is certainly not what we do for End Users.
Should we adopt a process similar to what we ADOPTERS.md in the CNPG repo?

[gbartolini]

Adopters is normally done in chronological order to give more credit to the early adopters.