RFR: 7794: Update the link to the adoptium download site

[Bernd]

On Wed, 13 Apr 2022 23:24:32 GMT, Marcus Hirt <hirt at openjdk.org> wrote:

>> The AdoptOpenJDK no longer has the latest builds.
>> Also use https for Links.
>
> README.md line 18:
> 
>> 16: * Downloadable Eclipse update site archive
>> 17: 
>> 18: [https://adoptium.net/de/jmc](https://adoptium.net/de/jmc)
> 
> I think the URL should likely be:
> https://adoptium.net/jmc/

Correct, that was an automatic locale redirect it seems..

-------------

PR: https://git.openjdk.java.net/jmc/pull/397