fix(protocol): Fix bug in getProposedBlock

[dantaik]

getProposedBlock current doesn't check input id's boundary.

[vercel]

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Name	Status	Preview	Updated
bridge-ui	🔄 Building (Inspect)		Jan 7, 2023 at 2:59PM (UTC)

[dantaik]

@d1onys1us It seems somehow this commit of yours breaks the solidity workflow (https://github.com/taikoxyz/taiko-mono/actions/runs/3862638351/jobs/6584339122):

[codecov]

Codecov Report

Merging #11679 (e9df913) into main (b54a37e) will increase coverage by 0.20%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##             main   #11679      +/-   ##
==========================================
+ Coverage   67.68%   67.88%   +0.20%     
==========================================
  Files         109      109              
  Lines        2940     2943       +3     
  Branches      355      356       +1     
==========================================
+ Hits         1990     1998       +8     
+ Misses        874      868       -6     
- Partials       76       77       +1     

Flag	Coverage Δ		*Carryforward flag
bridge-ui	95.05% <ø> (ø)		Carriedforward from e8ada7b
protocol	61.55% <0.00%> (+0.41%)	⬆️
relayer	69.10% <ø> (ø)		Carriedforward from e8ada7b
ui	100.00% <ø> (ø)		Carriedforward from e8ada7b

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

Impacted Files	Coverage Δ
packages/protocol/contracts/L1/TaikoL1.sol	39.21% <0.00%> (ø)
...ckages/protocol/contracts/L1/libs/LibProposing.sol	4.83% <0.00%> (-0.25%)	⬇️
...es/protocol/contracts/thirdparty/LibMerkleTrie.sol	90.36% <0.00%> (+7.22%)	⬆️
...ges/protocol/contracts/libs/LibAnchorSignature.sol	100.00% <0.00%> (+10.52%)	⬆️

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