docs: Clarify specifying deps, PR feedback

Author: rimutaka

src/doc/src/reference/specifying-dependencies.md

@@ -197,7 +197,7 @@ regex-lite   = { git = "https://github.com/rust-lang/regex.git" }
 regex-syntax = { git = "https://github.com/rust-lang/regex.git" }
 ```
 
-The above rule does not apply to local paths specified via `path` key.
+The above rule does not apply to [`path` dependencies](#specifying-path-dependencies).
 
 ### Choice of commit
 
@@ -248,7 +248,7 @@ regex = { git = "https://github.com/rust-lang/regex.git#4c59b70", path = "../reg
 Cargo locks the commits of `git` dependencies in `Cargo.lock` file at the time of their addition
 and checks for updates only when you run `cargo update` command.
 
-### The role of _version_ key
+### The role of the `version` key
 
 The `version` key always implies that the package is available in a registry,
 regardless of the presence of `git` or `path` keys.