test(caa upload): Update Amazon tests

The example release has 5 images, but only 4 thumbnails are shown on
amazon.com by default. Using the embedded JavaScript we can extract
larger images whose filenames contain different identifiers.
Additionally we can also detect the type of the front and the back.

tests/mb_enhanced_cover_art_uploads/providers/amazon.test.ts

@@ -36,12 +36,14 @@ describe('amazon provider', () => {
     `('grabs all images for physical products on $desc', async ({ url }: { url: string }) => {
         const covers = await provider.findImages(new URL(url));
 
-        expect(covers).toBeArrayOfSize(4);
-        expect(covers[0].url.pathname).toContain('51nM1ikLWPL');
+        expect(covers).toBeArrayOfSize(5);
+        expect(covers[0].url.pathname).toContain('81bqssuW6LL');
         expect(covers[0].types).toStrictEqual([ArtworkTypeIDs.Front]);
-        expect(covers[1].url.pathname).toContain('41RQivjYeeL');
-        expect(covers[2].url.pathname).toContain('31-n8wloCcL');
-        expect(covers[3].url.pathname).toMatch(/41MN(?:%2B|\+)eLL(?:%2B|\+)JL/);
+        expect(covers[1].url.pathname).toContain('61jZYB6BJYL');
+        expect(covers[1].types).toStrictEqual([ArtworkTypeIDs.Back]);
+        expect(covers[2].url.pathname).toContain('71TLgC33KgL');
+        expect(covers[3].url.pathname).toContain('81JCfIAZ71L');
+        expect(covers[4].url.pathname).toContain('816dglIIJHL');
     });
 
     it('returns no covers for product without images', async () => {