fix(bridge-ui): fix proof

[jscriptcoder]

We no longer use blockHeader in our SignalProof. Fixing the encoded proof:

    // Encode the SignalProof struct:
    // struct SignalProof {
    //   uint256 height;
    //   bytes proof;
    // }
    const signalProof = ethers.utils.defaultAbiCoder.encode(
      ['tuple(uint256 height, bytes proof)'],
      [{ height: blockHeight, proof: encodedProof }],
    );

[codecov]

Codecov Report

Merging #13748 (eaedd68) into main (e3746ee) will decrease coverage by 0.08%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main   #13748      +/-   ##
==========================================
- Coverage   44.98%   44.90%   -0.08%     
==========================================
  Files         130      130              
  Lines        3519     3514       -5     
  Branches      363      361       -2     
==========================================
- Hits         1583     1578       -5     
  Misses       1835     1835              
  Partials      101      101              

Flag	Coverage Δ		*Carryforward flag
bridge-ui	95.96% <100.00%> (-0.05%)	⬇️
eventindexer	82.08% <ø> (ø)		Carriedforward from e3746ee
protocol	0.00% <ø> (ø)		Carriedforward from e3746ee
relayer	62.53% <ø> (ø)		Carriedforward from e3746ee
ui	100.00% <ø> (ø)		Carriedforward from e3746ee

*This pull request uses carry forward flags. Click here to find out more.

Impacted Files	Coverage Δ
packages/bridge-ui/src/proof/ProofService.ts	100.00% <100.00%> (ø)

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