Update alpine to v3.20

Dockerfile

@@ -1,5 +1,5 @@
 # build
-FROM golang:1.22-alpine3.19 AS builder
+FROM golang:1.22-alpine3.20 AS builder
 RUN apk --no-cache add make git
 WORKDIR /work
 
@@ -13,7 +13,7 @@ RUN make build
 # The linux binary for hub can not run on alpine.
 # So we need to build it from source.
 # https://github.com/github/hub/issues/1818
-FROM golang:1.22-alpine3.19 AS hub
+FROM golang:1.22-alpine3.20 AS hub
 RUN apk add --no-cache bash git
 RUN git clone https://github.com/github/hub /work
 WORKDIR /work
@@ -22,7 +22,7 @@ RUN ./script/build -o bin/hub
 # runtime
 # Note: Required Tools for Primary Containers on CircleCI
 # https://circleci.com/docs/2.0/custom-images/#required-tools-for-primary-containers
-FROM alpine:3.18
+FROM alpine:3.20
 RUN apk --no-cache add bash git openssh-client tar gzip ca-certificates
 COPY --from=builder /work/bin/hcledit /usr/local/bin/
 COPY --from=hub /work/bin/hub /usr/local/bin/