New code-coverage and track-allocation options missing from docs

[philbit]

The new file/directory scope specification for --code-coverage and --track-allocation via the @ syntax introduced in #44359, as described by the command line help seems to be missing from the docs.
Command line help:

--code-coverage[={none*|user|all}]
                            Count executions of source lines (omitting setting is equivalent to `user`)
--code-coverage=@<path>
                            Count executions but only in files that fall under the given file path/directory.
                            The `@` prefix is required to select this option. A `@` with no path will track the
                            current directory.
 --code-coverage=tracefile.info
                            Append coverage information to the LCOV tracefile (filename supports format tokens)
 --track-allocation[={none*|user|all}]
                            Count bytes allocated by each source line (omitting setting is equivalent to `user`)
 --track-allocation=@<path>
                            Count bytes but only in files that fall under the given file path/directory.
                            The `@` prefix is required to select this option. A `@` with no path will track the
                            current directory.

Docs:

Switch	Description
[...]	[...]
--code-coverage[={none*|user|all}]	Count executions of source lines (omitting setting is equivalent to user)
--code-coverage=tracefile.info	Append coverage information to the LCOV tracefile (filename supports format tokens).
--track-allocation[={none*|user|all}]	Count bytes allocated by each source line (omitting setting is equivalent to "user")
[...]	[...]

They are missing both for v1.8 as well as on master. I am going to make pull request.