Triggers the 1.2.0 release (#257)

- Triggers the 1.2.0 release
- Bumps the crate version of `pallet-staking`, `pallet-balances` and
`frame-support` as per
paritytech/polkadot-sdk#3871

`Call::restore_ledger` weights taken from
[polkadot-sdk](https://github.com/paritytech/polkadot-sdk/blob/master/substrate/frame/staking/src/weights.rs)
(generated with bench bot).

---------

Co-authored-by: Bastian Köcher <[email protected]>

Author: gpestana

CHANGELOG.md

@@ -4,7 +4,7 @@ Changelog for the runtimes governed by the Polkadot Fellowship.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
-## [Unreleased]
+## [1.2.0] 28.03.2024
 
 ### Added
 

Cargo.lock

@@ -42,7 +42,7 @@ frame-benchmarking = { version = "29.0.0", default-features = false }
 frame-election-provider-support = { version = "29.0.0", default-features = false }
 frame-executive = { version = "29.0.0", default-features = false }
 frame-remote-externalities = { version = "0.36.0" }
-frame-support = { version = "29.0.0", default-features = false }
+frame-support = { version = "29.0.2", default-features = false }
 frame-system = { version = "29.0.0", default-features = false }
 frame-system-benchmarking = { version = "29.0.0", default-features = false }
 frame-system-rpc-runtime-api = { version = "27.0.0", default-features = false }
@@ -60,7 +60,7 @@ pallet-authority-discovery = { version = "29.0.1", default-features = false }
 pallet-authorship = { version = "29.0.0", default-features = false }
 pallet-babe = { version = "29.0.0", default-features = false }
 pallet-bags-list = { version = "28.0.0", default-features = false }
-pallet-balances = { version = "29.0.0", default-features = false }
+pallet-balances = { version = "29.0.1", default-features = false }
 pallet-beefy = { version = "29.0.0", default-features = false }
 pallet-beefy-mmr = { version = "29.0.0", default-features = false }
 pallet-bounties = { version = "28.0.0", default-features = false }
@@ -115,7 +115,7 @@ pallet-scheduler = { version = "30.0.0", default-features = false }
 pallet-session = { version = "29.0.0", default-features = false }
 pallet-session-benchmarking = { version = "29.0.0", default-features = false }
 pallet-society = { version = "29.0.0", default-features = false }
-pallet-staking = { version = "29.0.0", default-features = false }
+pallet-staking = { version = "29.0.2", default-features = false }
 pallet-staking-reward-curve = { version = "11.0.0" }
 pallet-staking-reward-fn = { version = "20.0.0", default-features = false }
 pallet-staking-runtime-api = { version = "15.0.0", default-features = false }