[Snyk] Security upgrade alpine from 3.15 to 3#6

fchyla wants to merge 1 commit intomasterfchyla/simplesamlphp-alpine:masterfrom

snyk-fix-6f40b45a84fa634bfbdc680b2f0ef0b9fchyla/simplesamlphp-alpine:snyk-fix-6f40b45a84fa634bfbdc680b2f0ef0b9Copy head branch name to clipboard