Final attempt to fix last two URLs

* removed bad mirror in a repolist - fixed
* attempt to fix non-passing but good URL in disa_stig_part2.md

Author: sspencerwire

docs/books/admin_guide/13-softwares.md

@@ -415,7 +415,7 @@ Repo-pkgs          : 1,650
 Repo-available-pkgs: 1,107
 Repo-size          : 6.4 G
 Repo-mirrors       : https://mirrors.rockylinux.org/mirrorlist?arch=aarch64&repo=PowerTools-8
-Repo-baseurl       : http://mirror.netweaver.uk/rocky/8.5/PowerTools/aarch64/os/ (56 more)
+Repo-baseurl       : https://mirror2.sandyriver.net/pub/rocky/8.6/PowerTools/x86_64/os/ (30 more)
 Repo-expire        : 172,800 second(s) (last: Tue 22 Mar 2022 05:49:24 PM CET)
 Repo-filename      : /etc/yum.repos.d/Rocky-PowerTools.repo
 ...

docs/books/disa_stig/disa_stig_part2.md

@@ -38,7 +38,7 @@ DISA is just one of many Security Profiles supported by the Rocky Linux SCAP def
 
 * [ANSSI](https://www.ssi.gouv.fr/en/)
 * [CIS](https://cisecurity.org)
-* [Australian Cyber Security Center](https://cyber.gov.au/)
+* [Australian Cyber Security Center](https://cyber.gov.au)
 * [NIST-800-171](https://csrc.nist.gov/publications/detail/sp/800-171/rev-2/final)
 * [HIPAA](https://www.hhs.gov/hipaa/for-professionals/security/laws-regulations/index.html)
 * [PCI-DSS](https://www.pcisecuritystandards.org/)