Update alpine Docker tag to v3.17

Author: renovate[bot]

Dockerfile

@@ -1,4 +1,4 @@
-FROM alpine:3.13@sha256:469b6e04ee185740477efa44ed5bdd64a07bbdd6c7e5f5d169e540889597b911 AS builder
+FROM alpine:3.17@sha256:ff6bdca1701f3a8a67e328815ff2346b0e4067d32ec36b7992c1fdc001dc8517 AS builder
 
 ENV GIT_CRYPT_VERSION 0.6.0
 ENV GIT_CRYPT_CHECKSUM 777c0c7aadbbc758b69aff1339ca61697011ef7b92f1d1ee9518a8ee7702bb78
@@ -17,7 +17,7 @@ RUN curl -fSsL https://github.com/AGWA/git-crypt/archive/$GIT_CRYPT_VERSION.tar.
     && make \
     && make install PREFIX=/usr
 
-FROM alpine:3.13@sha256:469b6e04ee185740477efa44ed5bdd64a07bbdd6c7e5f5d169e540889597b911
+FROM alpine:3.17@sha256:ff6bdca1701f3a8a67e328815ff2346b0e4067d32ec36b7992c1fdc001dc8517
 
 RUN apk --update --no-cache add \
     git \