Tests: Rename "test_jpg" to "test_jpeg_sof0_one_scan"

Author: https://github.com/LucasChollet
Commit: a40c7354c1
Pull-request: https://github.com/SerenityOS/serenity/pull/17627
Reviewed-by: https://github.com/nico ✅

Tests/LibGfx/TestImageDecoder.cpp

@@ -86,7 +86,7 @@ TEST_CASE(test_bmp_embedded_in_ico)
     EXPECT(!plugin_decoder->frame(0).is_error());
 }
 
-TEST_CASE(test_jpg)
+TEST_CASE(test_jpeg_sof0_one_scan)
 {
     auto file = MUST(Core::MappedFile::map(TEST_INPUT("rgb24.jpg"sv)));
     EXPECT(Gfx::JPEGImageDecoderPlugin::sniff(file->bytes()));