Update RHEL OS Base Image to 8.8+

Since many DoD users need to follow DISA STIGs, there is a CAT 1 finding on RHEL8 V1R10 STIG for: Rule Title: RHEL 8 must be a vendor-supported release.

Please update the Base Image Version to a support version such as 8.8+ (preferably 8.10 as it has longest support)

Red Hat Enterprise Linux Server release 8.6 (Ootpa)
Current End of Extended Update Support for RHEL 8.1 is 30 November 2021.
Current End of Extended Update Support for RHEL 8.2 is 30 April 2022.
Current End of Extended Update Support for RHEL 8.4 is 31 May 2023.
Current End of Maintenance Support for RHEL 8.5 is 31 May 2022.
Current End of Extended Update Support for RHEL 8.6 is 31 May 2024.
Current End of Maintenance Support for RHEL 8.7 is 31 May 2023.
Current End of Extended Update Support for RHEL 8.8 is 31 May 2025.
Current End of Maintenance Support for RHEL 8.9 is 31 May 2024.
Current End of Maintenance Support for RHEL 8.10 is 31 May 2029.
If the release is not supported by the vendor, this is a finding.