Fix parameter names to fit data provider given keys

As of named parameters introduction, this is something phpunit wants to use as well most likely, so argument names should fit the data providers.

tests/Unit/Service/NamingServiceTest.php

@@ -122,10 +122,10 @@ public static function getUniqueFilenameDataProvider(): \Generator
     }
 
     /** @dataProvider validationGoodFileNamesDataProvider */
-    public function testValidateGoodFilename(string $goodFilename): void
+    public function testValidateGoodFilename(string $fileName): void
     {
         $sut = $this->getSut();
-        $this->assertTrue($sut->validateFileName($goodFilename));
+        $this->assertTrue($sut->validateFileName($fileName));
     }
 
     public static function validationGoodFileNamesDataProvider(): \Generator
@@ -134,12 +134,12 @@ public static function validationGoodFileNamesDataProvider(): \Generator
     }
 
     /** @dataProvider validationBadFileNamesDataProvider */
-    public function testValidateBadFilename(string $badFilename): void
+    public function testValidateBadFilename(string $fileName): void
     {
         $sut = $this->getSut();
 
         $this->expectException(WrongFileTypeException::class);
-        $sut->validateFileName($badFilename);
+        $sut->validateFileName($fileName);
     }
 
     public static function validationBadFileNamesDataProvider(): \Generator