BUG #16761: BUG Cannot install last pg_activity. The package not signed

The following bug has been logged on the website:

Bug reference:      16761
Logged by:          Cesar Jorge Martínez
Email address:      cesarjorgemartinez@gmail.com
PostgreSQL version: 11.10
Operating system:   CentOS/RedHat 7.9
Description:

Hi,

Cannot install last pg_activity because the package not signed.

sudo yum install --enablerepo=pgdg11,pgdg-common pg_activity

Then:
Downloading packages:
The package pg_activity-1.6.2-1.rhel7.noarch.rpm not signed
          ]  0.0 B/s |    0 B  --:--:-- ETA 
pg_activity-1.6.2-1.rhel7.noarch.rpm
                           |  49 kB  00:00:04     

Regards,
Cesar Jorge