Upgrade cargo semver checks to 0.20.0 (#2631)

## Motivation and Context
cargo semver-checks 0.20.0 is something like 100x faster


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Author: rcoh

tools/ci-build/Dockerfile

@@ -139,7 +139,7 @@ ARG rust_nightly_version
 RUN cargo +${rust_nightly_version} -Z sparse-registry install cargo-wasi --locked --version ${cargo_wasi_version}
 
 FROM install_rust AS cargo_semver_checks
-ARG cargo_semver_checks_version=0.19.0
+ARG cargo_semver_checks_version=0.20.0
 ARG rust_nightly_version
 RUN cargo +${rust_nightly_version} -Z sparse-registry install cargo-semver-checks --locked --version ${cargo_semver_checks_version}
 #