Update http crate dependency

[cbrit]

Steward is breaking in dev when I pull in a version of somm_proto that includes the pubsub bindings in the axelar-v2 branch. This is happening despite the fact that there is no diff between the lock files on main and axelar-v2:

error: failed to select a version for `http`.
    ... required by package `axum v0.6.9`
    ... which satisfies dependency `axum = "^0.6.9"` of package `tonic v0.9.0`
    ... which satisfies dependency `tonic = "^0.9"` of package `cosmos-sdk-proto v0.19.0 (http://github.com/cosmos/cosmos-rust?branch=main#aef5c708)`
    ... which satisfies git dependency `cosmos-sdk-proto` of package `somm_proto v5.0.0 (https://github.com/peggyjv/sommelier?branch=axelar-v2#fe273124)`
    ... which satisfies git dependency `somm_proto` of package `steward v3.0.0 (/Users/atro/source/work/steward)`
versions that meet the requirements `^0.2.9` are: 0.2.9

all possible versions conflict with previously selected packages.

  previously selected package `http v0.2.8`
    ... which satisfies dependency `http = "^0.2.0"` (locked to 0.2.8) of package `actix-connect v2.0.0`
    ... which satisfies dependency `actix-connect = "^2.0.0"` (locked to 2.0.0) of package `actix-http v2.2.2`
    ... which satisfies dependency `actix-http = "^2.2.0"` (locked to 2.2.2) of package `actix-web v3.3.3`
    ... which satisfies dependency `actix-web = "^3"` (locked to 3.3.3) of package `contact v0.4.2`
    ... which satisfies dependency `contact = "^0.4"` (locked to 0.4.2) of package `register_delegate_keys v2.0.0 (https://github.com/PeggyJV/gravity-bridge?branch=main#7ce6b3c1)`
    ... which satisfies git dependency `register_delegate_keys` (locked to 2.0.0) of package `gravity_bridge v2.0.4 (https://github.com/PeggyJV/gravity-bridge?branch=main#7ce6b3c1)`
    ... which satisfies git dependency `gravity_bridge` (locked to 2.0.4) of package `steward v3.0.0 (/Users/atro/source/work/steward)`

failed to select a version for `http` which could resolve this conflict

I've made this change locally so I can continue development, but wanted to go ahead and make a PR to reflect the change.