pr_4157.prdoc

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title: "Bridge: added free headers submission support to the substrate-relay"

doc:
  - audience: Node Dev
    description: |
      Bridge finality and parachains relayer now supports mode, where it only submits some headers
      for free. There's a setting in a runtime configuration, which introduces this "free header"
      concept. Submitting such header is considered a common good deed, so it is free for relayers.

crates:
  - name: bp-bridge-hub-kusama
    bump: major
  - name: bp-bridge-hub-polkadot
    bump: major
  - name: bp-bridge-hub-rococo
    bump: major
  - name: bp-bridge-hub-westend
    bump: major
  - name: relay-substrate-client
    bump: major
  - name: finality-relay
    bump: major
  - name: substrate-relay-helper
    bump: major
  - name: parachains-relay
    bump: major