Update alpine Docker tag to v3.20.1

Author: renovate[bot]

Dockerfile

@@ -36,6 +36,6 @@ COPY --from=java-builder concourse-github-app-token/build/libs/concourse-github-
 COPY reflect-config.json /app/reflect-config.json
 RUN cd /app; native-image --no-fallback --static --libc=musl --enable-https -H:ReflectionConfigurationFiles=reflect-config.json -jar concourse-github-app-token.jar
 
-FROM alpine:3.20.0@sha256:77726ef6b57ddf65bb551896826ec38bc3e53f75cdde31354fbffb4f25238ebd
+FROM alpine:3.20.1@sha256:cf3f1802132e21fa51a6edd5b0c41084de134959fddf9dc5d9faf2920a2985b2
 COPY --from=build /app/concourse-github-app-token /opt/resource/resource
 COPY opt/resource opt/resource