doc: add explicit example with ^ and leading 0
doc: add explicit example with ^ and leading 0

Since the leading 0 is treated a bit special, its worth it to have an
explicit example to match the above example of the major version being >
0.

rustyhorde/cargo,rust-lang/cargo,rustyhorde/cargo,vojtechkral/cargo,rust-lang/cargo,tsurai/cargo,vojtechkral/cargo,tsurai/cargo,eminence/cargo,nipunn1313/cargo,tsurai/cargo,tshepang/cargo,nipunn1313/cargo,eminence/cargo,tsurai/cargo,vojtechkral/cargo,tsurai/cargo,rustyhorde/cargo,eminence/cargo,tshepang/cargo,rust-lang/cargo,nipunn1313/cargo,eminence/cargo,tshepang/cargo,vojtechkral/cargo,rustyhorde/cargo,rust-lang/cargo,nipunn1313/cargo,tshepang/cargo