replaced substr with substring

[k-rajat19]

JS string substr gives deprecated warning it should be avoided to use.
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/substr

[codecov-commenter]

Codecov Report

Merging #12066 (62e8179) into main (42b020f) will not change coverage.
The diff coverage is 80.00%.

@@           Coverage Diff           @@
##             main   #12066   +/-   ##
=======================================
  Coverage   68.88%   68.88%           
=======================================
  Files         324      324           
  Lines       16669    16669           
  Branches     4814     4814           
=======================================
  Hits        11483    11483           
  Misses       5153     5153           
  Partials       33       33           

Impacted Files	Coverage Δ
packages/jest-config/src/utils.ts	69.56% <ø> (ø)
packages/jest-snapshot/src/index.ts	78.61% <0.00%> (ø)
packages/jest-haste-map/src/lib/fast_path.ts	100.00% <100.00%> (ø)
packages/jest-haste-map/src/worker.ts	95.65% <100.00%> (ø)
packages/jest-transform/src/ScriptTransformer.ts	79.16% <100.00%> (ø)

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[SimenB]

thanks! I left one inline comment, but in addition to that, could you update the changelog?
🙂

[SimenB]

thanks!

[github-actions]

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