minor symfony#26373 [WebProfilerBundle] fix wrong variable for profiler counting ajax requests (Marin Nicolae)

This PR was squashed before being merged into the 2.7 branch (closes symfony#26373).

Discussion
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[WebProfilerBundle] fix wrong variable for profiler counting ajax requests

| Q             | A
| ------------- | ---
| Branch?       |  2.7
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | symfony#26364
| License       | MIT
| Doc PR        | symfony/symfony-docs#...

Symfony WebProfiler base js change variable tbodies to tbody for counting Ajax Requests.

Commits
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0fb83af [WebProfilerBundle] fix wrong variable for profiler counting ajax requests

Author: nicolas-grekas

src/Symfony/Bundle/WebProfilerBundle/Resources/views/Profiler/base_js.html.twig

@@ -108,9 +108,9 @@
                     var rows = document.createDocumentFragment();
 
                     if (requestStack.length) {
-                        var nbOfAjaxRequest = tbodies.rows.length;
+                        var nbOfAjaxRequest = tbody.rows.length;
                         if (nbOfAjaxRequest >= 100) {
-                            tbodies.deleteRow(nbOfAjaxRequest - 1);
+                            tbody.deleteRow(nbOfAjaxRequest - 1);
                         }
 
                         for (var i = 0; i < requestStack.length; i++) {