fix: update EIP712_ALLOCATION_PROOF_TYPEHASH from variable to constant. (OZ N-06)

[MoonBoi9001]

Motivation:

• This PR addresses the following N-06 OZ audit issue, applying the recommended fixes.

Title:

N-06 Variable Could Be constant

Details:

If a variable is only ever assigned a value when it is declared, then it could be declared as constant.

The EIP712_ALLOCATION_PROOF_TYPEHASH state variable could be constant.

To better convey the intended use of variables, consider adding the constant keyword to variables that are only set when they are declared.

Key changes

• Updated EIP712_ALLOCATION_PROOF_TYPEHASH to be a constant

[openzeppelin-code]

fix: update EIP712_ALLOCATION_PROOF_TYPEHASH from variable to constant. (OZ N-06)

Generated at commit: a58f807db20d1b7e82c0502a1995cd676d168fb2

🚨 Report Summary

	Severity Level	Results
Contracts	Critical High Medium Low Note Total	2 4 0 15 41 62
Dependencies	Critical High Medium Low Note Total	0 0 0 0 0 0

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For more details view the full report in OpenZeppelin Code Inspector

[tmigone]

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