[Snyk] Security upgrade alpine from 3.12 to 3.21.2#26

ianpogi5 wants to merge 1 commit intomasterkdcio/munin-server:masterfrom

snyk-fix-b5d2e4dae9dca9870d9a094392e6d752kdcio/munin-server:snyk-fix-b5d2e4dae9dca9870d9a094392e6d752Copy head branch name to clipboard