fix(docs): correct hash value in natspec (#1587)

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**Motivation:**

Small typo in natspec regarding hash value. The value in the code is
correct, but the docs are not.

**Modifications:**

* Fixed value in documentation for how salts were derived

**Result:**

More accurate docs

Author: nadir-akhtar

src/contracts/mixins/LeafCalculatorMixin.sol

@@ -17,7 +17,7 @@ abstract contract LeafCalculatorMixin {
     /// validate a proof. The salt ensures that leaves cannot be concatenated together to
     /// form a valid proof, as well as reducing the likelihood of an internal node matching
     /// the salt prefix.
-    /// @dev Value derived from keccak256("OPERATOR_INFO_LEAF_SALT") = 0x38...
+    /// @dev Value derived from keccak256("OPERATOR_INFO_LEAF_SALT") = 0x75...
     /// This ensures collision resistance and semantic meaning.
     uint8 public constant OPERATOR_INFO_LEAF_SALT = 0x75;
 
@@ -27,7 +27,7 @@ abstract contract LeafCalculatorMixin {
     /// validate a proof. The salt ensures that leaves cannot be concatenated together to
     /// form a valid proof, as well as reducing the likelihood of an internal node matching
     /// the salt prefix.
-    /// @dev Value derived from keccak256("OPERATOR_TABLE_LEAF_SALT") = 0x7d...
+    /// @dev Value derived from keccak256("OPERATOR_TABLE_LEAF_SALT") = 0x8e...
     /// This ensures collision resistance and semantic meaning.
     uint8 public constant OPERATOR_TABLE_LEAF_SALT = 0x8e;