chore(CategoryTheory/Subobject): correct inf_eq_map_pullback

[FernandoChu]

I'm fairly sure the previous version of inf_eq_map_pullback had a different statement than intended, indeed it was just inf_eq_map_pullback'.
I'm changing it to what it was probably intended to be, i.e. a statement about subobjects.

Co-authored-by: Andrew Yang the.erd.one@gmail.com

[github-actions]

PR summary d673ef89fc

Import changes for modified files

No significant changes to the import graph

Import changes for all files

Files	Import difference

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Declarations diff

+ toThinSkeleton_representative_eq_self

You can run this locally as follows

## summary with just the declaration names:
./scripts/declarations_diff.sh <optional_commit>

## more verbose report:
./scripts/declarations_diff.sh long <optional_commit>

The doc-module for scripts/declarations_diff.sh contains some details about this script.

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No changes to technical debt.

You can run this locally as

./scripts/technical-debt-metrics.sh pr_summary

• The relative value is the weighted sum of the differences with weight given by the inverse of the current value of the statistic.
• The absolute value is the relative value divided by the total sum of the inverses of the current values (i.e. the weighted average of the differences).