chore(deps): bump gravity-aptos api-types to 69008fd0 (drop legacy consensusAlpha)

[nekomoto911]

Summary

Re-pin gravity-api-types from b1f68dc8 to 69008fd0 (Galxe/gravity-aptos#77).

gravity-aptos#77 removes the legacy consensusAlpha epoch key from the
consensus-hardfork framework (deletes
ConsensusHardforks::from_genesis_extra_fields), closing the audit
finding Galxe/gravity-audit#925. greth does not reference that reader or
any ConsensusHardfork type, so this is a source-only dependency bump —
no greth code change.

Why greth needs to move

gravity-sdk pins both gaptos and (transitively, through greth)
api-types at the same gravity-aptos rev. To pick up #77 it must bump
gaptos to 69008fd0; cargo refuses to [patch] the same git URL to a
different rev, so greth must re-pin api-types to the matching rev or the
workspace links two incompatible api-types copies. This bump keeps
greth and gaptos in lockstep, as prior bumps did (e.g. #679, #771).

Verification

• cargo metadata --locked passes — the lockfile is consistent with the new rev (api-types' dependency set is unchanged by [feat] add metric when insert txn #77).
• Diff is Cargo.toml + Cargo.lock, one rev line each; no code and no other dependency churn.
• greth builds against the new api-types unchanged (the removed method is unused here); CI confirms.

Ref: Galxe/gravity-audit#925, Galxe/gravity-aptos#77