Bug 1718089 [wpt PR 29480] - Update wpt metadata, a=testonly

wpt-pr: 29480
wpt-type: metadata

testing/web-platform/meta/sanitizer-api/sanitizer-sanitize.https.tentative.html.ini

@@ -1,4 +1,5 @@
 [sanitizer-sanitize.https.tentative.html]
+  max-asserts: 53
   [SanitizerAPI with config: test html without close tag with dropElements list ['div'\], sanitize from string function for test html without close tag with dropElements list ['div'\]]
     expected: FAIL
 
@@ -140,3 +141,5 @@
   [SanitizerAPI with config: empty dropAttributes list with id attribute, sanitize from document fragment function for empty dropAttributes list with id attribute]
     expected: FAIL
 
+  [SanitizerAPI sanitize function shouldn't load the image.]
+    expected: FAIL