systemd: Fix broken RHEL 9 FIPS doc link

The RHEL 9 one is broken:
https://issues.redhat.com/browse/DOCS-1210

The RHEL 8 docs apply 100% to RHEL 9.

pkg/systemd/overview-cards/cryptoPolicies.jsx

@@ -115,7 +115,7 @@ const CryptoPolicyDialog = ({
                     variant='link'
                     isInline
                     icon={<ExternalLinkSquareAltIcon />} iconPosition="right"
-                    href="https://docs.redhat.com/documentation/en-us/red_hat_enterprise_linux/9/html/security_hardening/assembly_installing-the-system-in-fips-mode_security-hardening">
+                    href="https://docs.redhat.com/en/documentation/red_hat_enterprise_linux/8/html/security_hardening/switching-rhel-to-fips-mode_security-hardening">
                 {_("Learn more")}
             </Button>
         </Flex>),