chore: update list of supported operating systems (#1008)

updates the list of supported operating system by flagging the ones that
are not supported upstream anymore.

rocky linux 8.0 seems to be yet supported so this commit also adjusts
this hickup.

src/markdown-pages/install-with-kurl/system-requirements.md

@@ -8,13 +8,13 @@ title: "System Requirements"
 
 ## Supported Operating Systems
 
-* Ubuntu 18.04
+* Ubuntu 18.04<sup>\*</sup>
 * Ubuntu 20.04 (Docker version >= 19.03.10)
 * Ubuntu 22.04 (Requires Containerd version >= 1.5.10 or Docker version >= 20.10.17. Collectd add-ons are not supported.)
 * CentOS 7.4<sup>\*</sup>, 7.5<sup>\*</sup>, 7.6<sup>\*</sup>, 7.7<sup>\*</sup>, 7.8<sup>\*</sup>, 7.9, 8.0<sup>\*</sup>, 8.1<sup>\*</sup>, 8.2<sup>\*</sup>, 8.3<sup>\*</sup>, 8.4<sup>\*</sup> (CentOS 8.x requires Containerd)
-* RHEL 7.4<sup>\*</sup>, 7.5<sup>\*</sup>, 7.6<sup>\*</sup>, 7.7<sup>\*</sup>, 7.8<sup>\*</sup>, 7.9, 8.0<sup>\*</sup>, 8.1, 8.2, 8.3, 8.4, 8.5, 8.6, 8.7, 8.8, 9.0, 9.1, 9.2 (RHEL 8.x and 9.x require Containerd)
-* Rocky Linux 9.0, 9.1, 9.2 (Rocky Linux 9.x requires Containerd)
-* Oracle Linux 7.4<sup>\*</sup>, 7.5<sup>\*</sup>, 7.6<sup>\*</sup>, 7.7<sup>\*</sup>, 7.8<sup>\*</sup>, 7.9, 8.0<sup>\*</sup>, 8.1, 8.2, 8.3, 8.4, 8.5, 8.6, 8.7, 8.8 (OL 8.x requires Containerd)
+* RHEL 7.4<sup>\*</sup>, 7.5<sup>\*</sup>, 7.6<sup>\*</sup>, 7.7<sup>\*</sup>, 7.8<sup>\*</sup>, 7.9, 8.0<sup>\*</sup>, 8.1<sup>\*</sup>, 8.2<sup>\*</sup>, 8.3<sup>\*</sup>, 8.4<sup>\*</sup>, 8.5<sup>\*</sup>, 8.6, 8.7<sup>\*</sup>, 8.8, 9.0, 9.1<sup>\*</sup>, 9.2 (RHEL 8.x and 9.x require Containerd)
+* Rocky Linux 9.0<sup>\*</sup>, 9.1<sup>\*</sup>, 9.2 (Rocky Linux 9.x requires Containerd)
+* Oracle Linux 7.4<sup>\*</sup>, 7.5<sup>\*</sup>, 7.6<sup>\*</sup>, 7.7<sup>\*</sup>, 7.8<sup>\*</sup>, 7.9, 8.0, 8.1, 8.2, 8.3, 8.4, 8.5, 8.6, 8.7, 8.8 (OL 8.x requires Containerd)
 * Amazon Linux 2
 
 *&ast; This version is deprecated since it is no longer supported by its creator. We continue to support it, but support will be removed in the future.*