Re-word account creation error to be more descriptive

src/routes/auth/+page.svelte

@@ -45,7 +45,7 @@
 
 		if (!canvasPixelTest()) {
 			toast.error(
-				$i18n.t('Canvas pixel test failed, fingerprint evasion likely. Default image used.'),
+				$i18n.t('Canvas pixel test failed: fingerprint evasion likely. Using default avatar image.'),
 				{
 					position: "bottom-center",
 					autoClose: 1000 * 10,