Fix CI image build step (#780)

The docker CI build image is failing due to this error

249.5     Finished release [optimized] target(s) in 2m 49s
249.5   Installing /home/circleci/.cargo/bin/rustfilt
249.5    Installed package `rustfilt v0.2.1` (executable `rustfilt`)
249.5 error: failed to compile `cargo-binutils v0.3.6`, intermediate artifacts can be found at `/tmp/cargo-installrWENQG`
249.5 
249.5 Caused by:
249.5   package `cargo-platform v0.1.8` cannot be built because it requires rustc 1.73 or newer, while the currently active rustc version is 1.67.1
249.5   Try re-running cargo install with `--locked`
249.5      Summary Successfully installed rustfilt! Failed to install cargo-binutils (see error(s) above).
249.5 error: some crates failed to install

So I am bumping the version up

Author: drdrsh

Dockerfile.ci

@@ -1,4 +1,4 @@
-FROM cimg/rust:1.67.1
+FROM cimg/rust:1.79.0
 COPY --from=sclevine/yj /bin/yj /bin/yj
 RUN /bin/yj -h
 RUN sudo apt-get update && \