SUSE Enterprise Server 15 SP4 Moderate: Spectre-Meltdown-Checker Update

## This update for spectre-meltdown-checker fixes the following issues: * updated to 0.46 This release mainly focuses on the detection of the new Zenbleed (CVE-2023-20593) vulnerability, among few other changes that were in line waiting for a release: * feat: detect the vulnerability and mitigation of Zenbleed (CVE-2023-20593) * feat: add the linux-firmware repository as another source for CPU microcode versions * feat: arm: add Neoverse-N2, Neoverse-V1 and Neoverse-V2 * fix: docker: adding missing utils (#433) * feat: add support for Guix System kernel * fix: rewrite SQL to be sqlite3 >= 3.41 compatible (#443) * fix: a /devnull file was mistakenly created on the filesystem * fix: fwdb: ignore MCEdb versions where an official Intel version exists (fixes #430) * updated to 0.45