Fix `pin_all_from` incorrectly removing "js" substring from filenames #644

Job	Run time
Tests (Ruby 3.1, Rails 6.1, sprockets)	1m 27s
Tests (Ruby 3.1, Rails 7.0, sprockets)	1m 12s
Tests (Ruby 3.1, Rails 7.1, sprockets)	49s
Tests (Ruby 3.1, Rails 7.1, propshaft)	42s
Tests (Ruby 3.1, Rails 7.2, sprockets)	1m 0s
Tests (Ruby 3.1, Rails 7.0, propshaft)	1m 10s
Tests (Ruby 3.2, Rails 7.1, sprockets)	49s
Tests (Ruby 3.2, Rails 6.1, sprockets)	1m 37s
Tests (Ruby 3.2, Rails 8.0, propshaft)	1m 8s
Tests (Ruby 3.2, Rails 7.0, sprockets)	53s
Tests (Ruby 3.2, Rails 7.0, propshaft)	50s
Tests (Ruby 3.1, Rails 7.2, propshaft)	1m 2s
Tests (Ruby 3.2, Rails 7.2, propshaft)	1m 10s
Tests (Ruby 3.2, Rails 7.1, propshaft)	51s
Tests (Ruby 3.2, Rails 7.2, sprockets)	1m 8s
Tests (Ruby 3.3, Rails 6.1, sprockets)	1m 42s
Tests (Ruby 3.3, Rails 7.0, sprockets)	49s
Tests (Ruby 3.3, Rails 7.1, propshaft)	49s
Tests (Ruby 3.3, Rails main, propshaft)	1m 16s
Tests (Ruby 3.3, Rails 7.2, propshaft)	1m 11s
Tests (Ruby 3.2, Rails main, propshaft)	1m 11s
Tests (Ruby 3.4, Rails 7.1, sprockets)	47s
Tests (Ruby 3.3, Rails 7.0, propshaft)	49s
Tests (Ruby 3.4, Rails 7.1, propshaft)	46s
Tests (Ruby 3.3, Rails 7.2, sprockets)	1m 9s
Tests (Ruby 3.3, Rails 8.0, propshaft)	1m 11s
Tests (Ruby 3.4, Rails 6.1, sprockets)	2m 2s
Tests (Ruby 3.4, Rails 8.0, propshaft)	1m 2s
Tests (Ruby 3.4, Rails 7.2, propshaft)	1m 6s
Tests (Ruby 3.4, Rails 7.0, sprockets)	1m 50s
Tests (Ruby 3.3, Rails 7.1, sprockets)	52s
Tests (Ruby 3.4, Rails 7.0, propshaft)	1m 50s
Tests (Ruby 3.4, Rails 7.2, sprockets)	1m 4s
Tests (Ruby 3.4, Rails main, propshaft)	1m 6s
	38m 20s

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