Fix pgspot update script check

[svenklemm]

Previously the pgspot call used in CI did not properly check the update script. Unsafe function creations for functions with changed signatures could go undetected in the update script.

[codecov]

Codecov Report

Merging #4701 (cd14666) into main (a26a597) will decrease coverage by 0.03%.
The diff coverage is 97.56%.

@@            Coverage Diff             @@
##             main    #4701      +/-   ##
==========================================
- Coverage   90.82%   90.78%   -0.04%     
==========================================
  Files         224      224              
  Lines       42344    42402      +58     
==========================================
+ Hits        38457    38496      +39     
- Misses       3887     3906      +19     

Impacted Files	Coverage Δ
src/chunk.h	100.00% <ø> (ø)
src/compat/compat.h	92.98% <87.50%> (-2.14%)	⬇️
src/hypertable_restrict_info.c	94.84% <94.59%> (-1.01%)	⬇️
src/chunk_scan.c	98.47% <98.73%> (+2.61%)	⬆️
src/chunk.c	95.19% <100.00%> (+0.09%)	⬆️
src/hypertable.c	87.07% <100.00%> (+0.23%)	⬆️
src/planner/constify_now.c	98.90% <100.00%> (+0.10%)	⬆️
src/planner/expand_hypertable.c	93.94% <100.00%> (-0.03%)	⬇️
src/bgw/job_stat.c	86.85% <0.00%> (-3.29%)	⬇️
src/loader/bgw_message_queue.c	85.52% <0.00%> (-2.64%)	⬇️
... and 4 more

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