fix heapsize syntax

10 jobs for 4.x in 4 minutes and 44 seconds (queued for 4 seconds)
Status Job ID Name Coverage
  Publish
passed build-version #76603

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passed build-version-all #76611

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passed build-version-all-free #76612

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passed build-version-images #76608

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passed build-version-images-jp2 #76609

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passed build-version-images-jp2-free #76610

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passed build-version-jp2 #76605

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passed build-version-jp2-free #76606

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passed build-version-vanilla #76604

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passed build-version-video #76607

00:01:45