Update stale deps stdlibs known bug warning

[LilithHafner]

I just got this error

Stale dependencies: Test Failed at /home/x/.julia/packages/Aqua/9p8ck/src/stale_deps.jl:31
  Expression: isempty(stale_deps)
   Evaluated: isempty(Base.PkgId[Base.PkgId(Base.UUID("9e88b42a-f829-5b0c-bbe9-9e923198166b"), "Serialization")])

So I think this bug is fixed.

Would tests be expected for this PR?

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 75.20%. Comparing base (34a1a02) to head (421a0e1).
Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #266   +/-   ##
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  Coverage   75.20%   75.20%           
=======================================
  Files          11       11           
  Lines         750      750           
=======================================
  Hits          564      564           
  Misses        186      186           

Flag	Coverage Δ
unittests	75.20% <ø> (ø)

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[lgoettgens]

Thanks for the report!
After creating a MWE and testing with different julia versions, Serialization gets reported as a stale dep in 1.11.0-alpha1 and nightly, but not in 1.10.2.
My guess is that this is due to the removal from the sysimg (JuliaLang/julia#51399). Other stdlibs that are still in the sysimg (e.g. LinearAlgebra) still won't get detected.

Thus instead of removing the warning, I would change the "stdlib" to "package in the sysimage" or something.

[LilithHafner]

I suspected that too, and even tested it to confirm. I must have made a mistake. I'll update the PR

[lgoettgens]

Thanks!