chore(deps): bump alpine from 3.14 to 3.15.0

Bumps alpine from 3.14 to 3.15.0.

---
updated-dependencies:
- dependency-name: alpine
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Dockerfile

@@ -2,7 +2,7 @@ FROM golang:1.17.3-alpine AS builder
 RUN apk add --no-cache git
 RUN go install -v github.com/projectdiscovery/httpx/cmd/httpx@latest
 
-FROM alpine:3.14
+FROM alpine:3.15.0
 RUN apk -U upgrade --no-cache \
     && apk add --no-cache bind-tools ca-certificates
 COPY --from=builder /go/bin/httpx /usr/local/bin/