chore: fix spellings and unused function args

No logic changes, just janitorial cleanup

s3api/utils/presign-auth-reader.go

@@ -240,7 +240,7 @@ func validateAlgorithm(algo string) error {
 	case algoECDSA:
 		return s3err.QueryAuthErrors.OnlyHMACSupported()
 	default:
-		// all other algorithms are considerd as invalid
+		// all other algorithms are considered as invalid
 		return s3err.QueryAuthErrors.UnsupportedAlgorithm()
 	}
 }

s3api/utils/utils.go

@@ -966,7 +966,7 @@ func ConvertToStringPtr[T any](val T) *string {
 	return &str
 }
 
-// Converst any pointer to a string pointer
+// Converts any pointer to a string pointer
 func ConvertPtrToStringPtr[T any](val *T) *string {
 	if val == nil {
 		return nil