Fix a bug in the webpack-sources patch that happens sometimes when us… #6780

Job	Run time
build	2m 50s
build-wasm (web)	22s
deploy-target	8s
build-wasm (nodejs)	22s
stable - x86_64-apple-darwin - node@16	53s
stable - aarch64-apple-darwin - node@16	53s
stable - aarch64-pc-windows-msvc - node@16	1m 48s
stable - x86_64-unknown-linux-gnu - node@16	1m 2s
stable - aarch64-unknown-linux-gnu - node@16	57s
Upload Turbopack Bytesize metrics to Datadog	0s
Deploy preview tarball	2m 4s
Deploy examples	0s
Potentially publish release	0s
Release Stats	0s
	11m 19s

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