Update alpine Docker tag to v3.22

Generated by renovateBot

Author: renovate[bot]

Dockerfile

@@ -34,7 +34,7 @@ COPY version.go version.go
 
 RUN CGO_ENABLED=0 GOOS=linux GOARCH=$TARGETARCH go build -a -o lk ./cmd/lk
 
-FROM alpine:3.21
+FROM alpine:3.22
 
 COPY --from=builder /workspace/lk /lk