Fix semver docs for 1.51.
Fix semver docs for 1.51.

eminence/cargo,eminence/cargo,nipunn1313/cargo,rust-lang/cargo,rustyhorde/cargo,nipunn1313/cargo,nipunn1313/cargo,rustyhorde/cargo,rust-lang/cargo,rust-lang/cargo,rustyhorde/cargo,eminence/cargo,rust-lang/cargo,nipunn1313/cargo,rustyhorde/cargo,eminence/cargo