Release v4.6.1

- Back-port previous GitHub release notes to `.github/releases/`
- Fix SUSE and Rocky Linux 8 builds

Signed-off-by: Jonathon Anderson <janderson@ciq.com>

.github/releases/v4.6.1.md

@@ -0,0 +1,15 @@
+Warewulf v4.6.1 is a regularly-scheduled minor release in the v4.6.x series.
+
+- aarch64 packages
+- new REST API
+- changes to JSON output
+- new command-line options
+- new IPMI tag to configure interface vlan
+- network configuration for `wwclient`
+- fixes to `wwctl upgrade` and default settings
+- other misc. bug fixes
+
+Significant changes are detailed in the [release
+notes](https://warewulf.org/docs/v4.6.x/release/v4.6.1.html). Additional changes
+may be listed in the
+[CHANGELOG](https://github.com/warewulf/warewulf/blob/main/CHANGELOG.md).