util: fix scientific notation formatting #8011

Job	Run time
Build slim tarball	1m 10s
aarch64-linux: Cache V8 build	21s
x86_64-darwin: with shared libraries	50m 8s
x86_64-linux: with shared libraries	27m 53s
aarch64-darwin: with shared libraries	23m 51s
aarch64-linux: with shared boringssl-0.20260526.0	24m 52s
aarch64-linux: with shared openssl-3.0.20	24m 42s
aarch64-linux: with shared openssl-3.5.6	24m 30s
aarch64-linux: with shared openssl-1.1.1w	24m 7s
aarch64-linux: with shared openssl-4.0.0	25m 16s
aarch64-linux: with shared openssl-3.6.2	24m 7s
	4h 10m 57s

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