Bump linkerd/dev from v42-rust-musl to v43-rust-musl (#342)

Bumps linkerd/dev from v42-rust-musl to v43-rust-musl.

---
updated-dependencies:
- dependency-name: linkerd/dev
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Dockerfile-cni-plugin

@@ -12,7 +12,7 @@ ARG TARGETARCH
 RUN CGO_ENABLED=0 GOOS=linux GOARCH=$TARGETARCH GO111MODULE=on \
     go build -o /go/bin/linkerd-cni -mod=readonly -ldflags "-s -w" -v ./cni-plugin/
 
-FROM --platform=$BUILDPLATFORM ghcr.io/linkerd/dev:v42-rust-musl as cni-repair-controller
+FROM --platform=$BUILDPLATFORM ghcr.io/linkerd/dev:v43-rust-musl as cni-repair-controller
 WORKDIR /build
 COPY --link justfile justfile-rust .
 COPY --link Cargo.toml Cargo.lock .