Fix typos

Author: ldhnam

Diff for: internal/checker/checker.go

@@ -28505,7 +28505,7 @@ func (c *Checker) removeNullableByIntersection(t *Type, targetFacts TypeFacts, o
 	// By default we intersect with a union of {} and the opposite nullable.
 	emptyAndOtherUnion := c.getUnionType([]*Type{c.emptyObjectType, otherType})
 	// For each constituent type that can compare equal to the target nullable, intersect with the above union
-	// if the type doesn't already include the oppsite nullable and the constituent can compare equal to the
+	// if the type doesn't already include the opposite nullable and the constituent can compare equal to the
 	// opposite nullable; otherwise, just intersect with {}.
 	return c.mapType(t, func(t *Type) *Type {
 		if c.hasTypeFacts(t, targetFacts) {