Bump alpine from 3.16 to 3.17 in /conformance (k3s-io#6687)

Bumps alpine from 3.16 to 3.17.

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

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conformance/Dockerfile

@@ -1,4 +1,4 @@
-FROM alpine:3.16
+FROM alpine:3.17
 ENV SONOBUOY_VERSION 0.56.10
 RUN apk add curl tar gzip
 RUN curl -sfL https://github.com/vmware-tanzu/sonobuoy/releases/download/v${SONOBUOY_VERSION}/sonobuoy_${SONOBUOY_VERSION}_linux_amd64.tar.gz | tar xvzf - -C /usr/bin