Polkadot SDK `stable2503` support

[khssnv]

An attempt to integrate to a parachain using stable2503-6 from crates.io fails with the following error.

$ cargo build
    Blocking waiting for file lock on package cache
    Updating git repository `https://github.com/RegionX-Labs/On-Demand.git`
    Updating git repository `https://github.com/paritytech/polkadot-sdk.git`
    Updating crates.io index
error: failed to select a version for `litep2p`.
    ... required by package `sc-network v0.48.5 (https://github.com/paritytech/polkadot-sdk.git?branch=stable2412#37f85a06)`
    ... which satisfies git dependency `sc-network` of package `polkadot-node-network-protocol v21.0.0 (https://github.com/paritytech/polkadot-sdk.git?branch=stable2412#37f85a06)`
    ... which satisfies git dependency `polkadot-node-network-protocol` of package `polkadot-overseer v21.1.0 (https://github.com/paritytech/polkadot-sdk.git?branch=stable2412#37f85a06)`
    ... which satisfies git dependency `polkadot-overseer` of package `cumulus-relay-chain-interface v0.21.0 (https://github.com/paritytech/polkadot-sdk.git?branch=stable2412#37f85a06)`
    ... which satisfies git dependency `cumulus-relay-chain-interface` of package `order-primitives v0.1.0 (https://github.com/RegionX-Labs/On-Demand.git?rev=e565f0e52f1e380e1d8d269e7e1b6cb5615c431c#e565f0e5)`
    ... which satisfies git dependency `order-primitives` of package `qf-parachain-runtime v0.1.0 (/home/khassanov/Workspace/github.com/QuantumFusion-network/qf-solochain/runtimes/parachain)`
    ... which satisfies path dependency `qf-parachain-runtime` (locked to 0.1.0) of package `qf-parachain-node v0.1.0 (/home/khassanov/Workspace/github.com/QuantumFusion-network/qf-solochain/parachain/node)`
versions that meet the requirements `^0.9.5` are: 0.9.5

all possible versions conflict with previously selected packages.

  previously selected package `litep2p v0.9.4`
    ... which satisfies dependency `litep2p = "^0.9.4"` (locked to 0.9.4) of package `sc-network v0.49.1`
    ... which satisfies dependency `sc-network = "^0.49.1"` (locked to 0.49.1) of package `qf-node v0.1.16 (/home/khassanov/Workspace/github.com/QuantumFusion-network/qf-solochain/node)`

failed to select a version for `litep2p` which could resolve this conflict