Update install-packages.xml postgres 14 and not 11

[strouja]

Hi, I think you had a typo, you meant to say Postgres 14 and not 11. If am wrong just ignore, thanks and take care James Stroud

[ibarwick]

Yup, good catch, thanks! Merged.

[strouja]

@ibarwick you are welcome. I was going to fix another part of your doc to include the repos for Postgres 14 on this page
https://dl.enterprisedb.com/default/release/site/
but the above page is not in this git repo
https://github.com/EnterpriseDB/repmgr

And on that page I was also going to change this line from:

On 13 March 2020 the GPG public keys used to sign packages in 2ndQuadrant public repositories will expire.

to:

On 13 March 2020 the GPG public keys used to sign packages in 2ndQuadrant public repositories expired.

If you can get me access to the source file for this https://dl.enterprisedb.com/default/release/site/ I will fix it for you guys.