[Snyk] Security upgrade alpine from latest to 3.15.4#3

snyk-bot wants to merge 1 commit intomasterwhoo/vscode-alpine:masterfrom

snyk-fix-b0440e2117906d6722e9b7fafbf7c8efwhoo/vscode-alpine:snyk-fix-b0440e2117906d6722e9b7fafbf7c8efCopy head branch name to clipboard