misc: n/a sealing: Fix grammatical error in a log warning message

[shotcollin]

Related Issues

No related issues; motivation is grammatically correct log warnings.

Proposed Changes

This pull request fixes a typographical error in a log warning message.

Additional Info

Checklist

Before you mark the PR ready for review, please make sure that:

• All commits have a clear commit message.
• The PR title is in the form of of <PR type>: <#issue number> <area>: <change being made>
  • example: fix: #1234 mempool: Introduce a cache for valid signatures
  • PR type: fix, feat, INTERFACE BREAKING CHANGE, CONSENSUS BREAKING, build, chore, ci, docs, misc,perf, refactor, revert, style, test
  • area: api, chain, state, vm, data transfer, market, mempool, message, block production, multisig, networking, paychan, proving, sealing, wallet
• This PR has tests for new functionality or change in behaviour
• If new user-facing features are introduced, clear usage guidelines and / or documentation updates should be included in https://lotus.filecoin.io or Discussion Tutorials.
• CI is green

[codecov]

Codecov Report

Merging #7831 (a259c7b) into master (dd20829) will decrease coverage by 0.07%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master    #7831      +/-   ##
==========================================
- Coverage   39.52%   39.44%   -0.08%     
==========================================
  Files         654      654              
  Lines       70013    70013              
==========================================
- Hits        27671    27615      -56     
- Misses      37594    37644      +50     
- Partials     4748     4754       +6     

Impacted Files	Coverage Δ
extern/sector-storage/partialfile/partialfile.go	43.90% <0.00%> (ø)
chain/events/message_cache.go	87.50% <0.00%> (-12.50%)	⬇️
chain/gen/slashfilter/slashfilter.go	40.00% <0.00%> (-12.00%)	⬇️
chain/events/observer.go	71.64% <0.00%> (-6.72%)	⬇️
chain/stmgr/execute.go	86.95% <0.00%> (-4.35%)	⬇️
chain/messagepool/repub.go	51.61% <0.00%> (-4.31%)	⬇️
node/hello/hello.go	63.63% <0.00%> (-3.41%)	⬇️
miner/miner.go	54.96% <0.00%> (-2.65%)	⬇️
storage/wdpost_sched.go	75.49% <0.00%> (-1.97%)	⬇️
chain/events/events_called.go	83.90% <0.00%> (-1.96%)	⬇️
... and 15 more

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