UPGRADING: fix missing backticks

Author: staabm

UPGRADING.md

@@ -287,8 +287,8 @@ Instead of `AccessoryArrayListType::intersectWith($type)`, do `TypeCombinator::i
   * Remove `TypeUtils::getEnumCaseObjects()`, use [`Type::getEnumCases()`](https://apiref.phpstan.org/2.0.x/PHPStan.Type.Type.html#_getEnumCases) instead
   * Remove `TypeUtils::containsCallable()`, use [`Type::isCallable()`](https://apiref.phpstan.org/2.0.x/PHPStan.Type.Type.html#_isCallable) instead
 * Removed `Scope::doNotTreatPhpDocTypesAsCertain()`, use `getNativeType()` instead
-* Parameter `$isList` in `ConstantArrayType` constructor can only be `TrinaryLogic`, no longer bool
-* Parameter `$nextAutoIndexes` in `ConstantArrayType` constructor can only be `non-empty-list<int>`, no longer int
+* Parameter `$isList` in `ConstantArrayType` constructor can only be `TrinaryLogic`, no longer `bool`
+* Parameter `$nextAutoIndexes` in `ConstantArrayType` constructor can only be `non-empty-list<int>`, no longer `int`
 * Remove `ConstantType` interface, use [`Type::isConstantValue()`](https://apiref.phpstan.org/2.0.x/PHPStan.Type.Type.html#_isConstantValue) instead
 * `acceptsNamedArguments()` in `FunctionReflection`, `ExtendedMethodReflection` and `CallableParametersAcceptor` interfaces returns `TrinaryLogic` instead of `bool`
 * Remove `FunctionReflection::isFinal()`