errata: Add advisories and errata affecting 13.1R

2023-02-08 FreeBSD-SA-23:01.geli
2023-02-16 FreeBSD-SA-23:03.openssl
2023-06-21 FreeBSD-SA-23:04.pam_krb5
2023-08-01 FreeBSD-SA-23:06.ipv6
2023-08-01 FreeBSD-SA-23:07.bhyve
2023-08-01 FreeBSD-SA-23:08.ssh
2023-08-01 FreeBSD-SA-23:09.pam_krb5

2023-02-08 FreeBSD-EN-23:01.tzdata
2023-02-08 FreeBSD-EN-23:02.sdhci
2023-02-08 FreeBSD-EN-23:03.ena
2023-02-08 FreeBSD-EN-23:04.ixgbe
2023-06-21 FreeBSD-EN-23:05.tzdata
2023-06-21 FreeBSD-EN-23:06.loader
2023-06-21 FreeBSD-EN-23:07.mpr