Fix: removed accidental '∫' symbol that caused syntax errors in code

[NikolaiKryshnev]

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Removed an unintended integral symbol ('∫') that was accidentally added to the code, likely due to a typing or copy-paste error. This symbol caused syntax errors during compilation. Removing it restores correct code execution.

[CLAassistant]

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[NikolaiKryshnev]

@LuizAsFight Hello! Just wanted to kindly follow up on this PR. Please let me know if there's anything else needed from my side to proceed with the merge. 😊

[fuel-cla-bot[bot]]

Thanks for the contribution! Before we can merge this, we need @NikolaiKryshnev to sign the Fuel Labs Contributor License Agreement.