chore(pact_verifier_cli): Upgrade docker image to use Alpine 3.18

rust/pact_verifier_cli/Dockerfile

@@ -1,4 +1,4 @@
-FROM rust:1-alpine3.16 AS builder
+FROM rust:1-alpine3.18 AS builder
 
 # Add our source code.
 ADD . /build
@@ -13,7 +13,7 @@ RUN sed -i -e 's/pact_verifier = {\s*version\s*=\s*"\([^"]*\).*/pact_verifier =
 RUN cd build && cargo build --release
 
 # Now, we need to build our _real_ Docker container, copying in the executable.
-FROM alpine:3.16.2
+FROM alpine:3.18
 RUN apk --no-cache add ca-certificates
 COPY --from=builder \
     /build/target/release/pact_verifier_cli \