Bug 1823014 [wpt PR 39052] - Update wpt metadata, a=testonly

wpt-pr: 39052
wpt-type: metadata

testing/web-platform/meta/css/css-contain/container-queries/at-container-style-serialization.html.ini

@@ -12,3 +12,6 @@
 
   [Unknown CSS property after 'or']
     expected: FAIL
+
+  [Original string number in custom property value]
+    expected: FAIL

testing/web-platform/meta/css/css-contain/container-queries/custom-property-style-queries.html.ini

@@ -129,3 +129,9 @@
 
   [Match registered <length> custom property with initial value via initial keyword.]
     expected: FAIL
+
+  [Should only match exact string for numbers in non-registered custom properties]
+    expected: FAIL
+
+  [Spaces should not collapse in non-registered custom properties]
+    expected: FAIL