Docs confusion and missing dependency on EL9

Hi,

for testing I tried to install spamassassin 4.0.1 on EL9 (AlmaLinux 
9.4). I have noticed some dependencies are not mentioned on the INSTALL 
page:

I have had to install perl-ExtUtils-MakeMaker.noarch to run Makefile.PL
I have had to install perl-Archive-Tar.noarch to run sa-update.

Those two are nowhere mentioned.

It also took me a while to find the instructions how to install.

I started at https://spamassassin.apache.org/index.html

where "Click here to get started using SpamAssassin! " looked promising.

But at

https://cwiki.apache.org/confluence/display/SPAMASSASSIN/StartUsing

I have spent considerable time to look for where to download and how to 
actually install spamassassin, but eventually gave up. Only now I have 
found some instructions on the SingleUserUnixInstall page.

So I have circled back and checked the Download link from the top. There 
I can download the tar, get hints on Upgrading but still nothing on 
installation.

The Wiki and FAQ links from the top are not helpful either.

So eventually, I have found it on "Docs", pointing to the INSTALL file.

 From experience, that it not really the first place I would look.

I would think the "Get Started" page should have a link to the Download 
and INSTALL page at the beginning. Downloading and installing seem to be 
the obvious first steps to get started.

The Download page should have a link for INSTALL like it already has for 
the Upgrade.

And I would say "Where to download" and "How to install" are pretty 
common FAQs, too.

I hope this helps.

Thanks,

Gerald