Bug 1633228 [wpt PR 23254] - Fix mobile table, a=testonly

Automatic update from web-platform-tests
for larger tables on mobile, you have to wrap in a div

and set overflow to auto so that they'll scroll the div instead of the window

--

wpt-commits: 5e7cbed423a3040dc8ca50359dd033a46dba5cf4
wpt-pr: 23254

testing/web-platform/tests/docs/assets/custom.css

@@ -4,4 +4,8 @@ div.body {
 
 #video-introduction-transcript iframe {
   max-width: 100%;
+}
+
+.table-container {
+  overflow: auto;
 }

testing/web-platform/tests/docs/writing-tests/making-a-testing-plan.md

@@ -482,6 +482,8 @@ use [git](https://git-scm.com) to perform more powerful searches.
 The following table lists some common search criteria and examples of how they
 can be expressed using regular expressions:
 
+<div class="table-container">
+
 ```eval_rst
 ================================= ================== ==========================
 Criteria                          Example match      Example regular expression
@@ -494,6 +496,8 @@ CSS property name                 ``style="foo: 4"`` ``([{;=\"']|\s|^)foo\s+:``
 ================================= ================== ==========================
 ```
 
+</div>
+
 Bear in mind that searches like this are not necessarily exhaustive. Depending
 on the feature, it may be difficult (or even impossible) to write a query that
 correctly identifies all relevant tests. This strategy can give a helpful