♻️ Hash of Manifest should include candidates

### Is there an existing issue for this?

- [X] I have searched the existing issues

### Suggestion

This is an update for documentation of hashing and proposing changes for 2.0.

The hash of the Manifest done in both languages does not include the contests. This seems like a necessity.

```py
def crypto_hash(self) -> ElementModQ:
"""
Returns a hash of the metadata components of the election
"""
hash = hash_elems(
self.election_scope_id,
str(self.type.name),
to_iso_date_string(self.start_date),
to_iso_date_string(self.end_date),
self.name,
self.contact_information,
self.geopolitical_units,
self.parties,
self.contests,
self.ballot_styles,
)
log_debug(f"{self.__class__} : crypto_hash: {hash.to_hex()}")
return hash
```

### Possible Implementation

_No response_

### Anything else?

Original Issue by @JohnLCaron
https://github.com/microsoft/electionguard-python/issues/523