ci: Fix failing builds (#144)

This error seems to have been introduced by the environment variable added in f57e866

Author: jacobsvante

docker/Dockerfile

@@ -4,5 +4,5 @@ ARG CHEF_TAG
 
 # Install musl-dev on Alpine to avoid error "ld: cannot find crti.o: No such file or directory"
 RUN ((cat /etc/os-release | grep ID | grep alpine) && apk add --no-cache musl-dev || true) \
-    && CARGO_NET_GIT_FETCH_WITH_CLI=true cargo install cargo-chef --locked --version $CHEF_TAG \
+    && cargo install cargo-chef --locked --version $CHEF_TAG \
     && rm -rf $CARGO_HOME/registry/