resources: Rename excepted filenames for image golden testdata

As documented in commit 30eea39,
some filenames have changed due to cache busting of PNG and Webp images.

This resolves recent TestImageOperationsGolden failure on arm64, ppc64le
and s390x.

See #6387 and #8729

resources/image_test.go

@@ -735,10 +735,9 @@ func assetGoldenDirs(c *qt.C, dir1, dir2 string) {
 
 		if !goldenEqual(nrgba1, nrgba2) {
 			switch fi1.Name() {
-			case "gohugoio8_hu7f72c00afdf7634587afaa5eff2a25b2_73538_4c320010919da2d8b63ed24818b4d8e1.png",
-				"gohugoio8_hu7f72c00afdf7634587afaa5eff2a25b2_73538_9d4c2220235b3c2d9fa6506be571560f.png",
-				"gohugoio8_hu7f72c00afdf7634587afaa5eff2a25b2_73538_c74bb417b961e09cf1aac2130b7b9b85.png",
-				"gohugoio8_hu7f72c00afdf7634587afaa5eff2a25b2_73538_300x200_fill_gaussian_smart1_2.png":
+			case "gohugoio8_hu7f72c00afdf7634587afaa5eff2a25b2_73538_73c19c5f80881858a85aa23cd0ca400d.png",
+				"gohugoio8_hu7f72c00afdf7634587afaa5eff2a25b2_73538_ae631e5252bb5d7b92bc766ad1a89069.png",
+				"gohugoio8_hu7f72c00afdf7634587afaa5eff2a25b2_73538_d1bbfa2629bffb90118cacce3fcfb924.png":
 				c.Log("expectedly differs from golden due to dithering:", fi1.Name())
 			default:
 				c.Errorf("resulting image differs from golden: %s", fi1.Name())