chore: fix typos & wording

[0xn4de]

This PR fixes wording and typos in Optimism Bedrock specs.

[coderabbitai]

Walkthrough

Walkthrough

The recent updates focus on refining the documentation and code comments for clarity and grammatical accuracy. They address potential security concerns in the gas market, ensure continuous user withdrawal processes, and clarify peer-to-peer emergency protocols. Additionally, they include updates to the versioning system for software upgrades, incorporating human-readable identifiers and pre-release policies. The changes also integrate the Shapella upgrade from L1 and make minor protocol adjustments.

Changes

File Path	Change Summary
specs/guaranteed-gas-market.md	Improved security measures against frontrunning attacks by adjusting gas market parameters.
specs/overview.md	Corrected subject-verb agreement and grammatical structure.
specs/proposals.md	Ensured ongoing output proposal submissions for uninterrupted user withdrawals.
specs/rollup-node-p2p.md	Clarified emergency broadcast protocols and removed redundant wording.
specs/span-batches.md	Corrected grammatical errors without affecting code logic.
specs/superchain-upgrades.md	Updated versioning system with human-readable identifiers and pre-release policies. Included Shapella upgrade and minor protocol changes.

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[codecov]

Codecov Report

Merging #8539 (d492640) into develop (0a7104c) will decrease coverage by 0.05%.
Report is 39 commits behind head on develop.
The diff coverage is n/a.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #8539      +/-   ##
===========================================
- Coverage    34.64%   34.60%   -0.05%     
===========================================
  Files          167      167              
  Lines         7155     7155              
  Branches      1209     1209              
===========================================
- Hits          2479     2476       -3     
- Misses        4525     4530       +5     
+ Partials       151      149       -2     

Flag	Coverage Δ
cannon-go-tests	63.48% <ø> (ø)
chain-mon-tests	27.14% <ø> (ø)
common-ts-tests	26.74% <ø> (ø)
contracts-bedrock-tests	20.24% <ø> (-0.15%)	⬇️
contracts-ts-tests	12.25% <ø> (ø)
core-utils-tests	44.03% <ø> (ø)
sdk-next-tests	42.18% <ø> (ø)
sdk-tests	42.18% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

see 3 files with indirect coverage changes

[trianglesphere]

TY for these small fixes