fix: Fixed example in README.md

[ArtemLavrentii]

Description

(not sure if bug-report is appropriate for a bug in documentation)

I was trying to copy-paste an example from README.md, and it resulted in compilation errors

Minimal code-snippet showcasing the problem

export const fileUploadOptions = () => {
    storage: multer.diskStorage({
        destination: (req: any, file: any, cb: any) => { ...
        },
        filename: (req: any, file: any, cb: any) => { ... // Compilation error here
        }
    }),
    fileFilter: (req: any, file: any, cb: any) => { ...
    },
    limits: {
        fieldNameSize: 255,
        fileSize: 1024 * 1024 * 2 // Compilation error here
    }
};

Expected behavior

There shouldn't be a compilation when copy-pasting the example

Actual behavior

There is a compilation error. This is because JS/TS parser thinks that this is a normal lambda ( eg () => { ... console.log and etc ... } ), with labels inserted in weird places.
Most likely the intent was to return an object instead. To do so, this "code-block" must be incapsulated in (), eg () => ({ object: true }).

[github-actions]

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