Describe precedence for pipe and throw operators (#5083)

* Throw operator precedence

* Pipe operator precedence

* Update language/operators/precedence.xml

Co-authored-by: Larry Garfield <larry@garfieldtech.com>

---------

Co-authored-by: Larry Garfield <larry@garfieldtech.com>

Author: vadimonus

language/operators/precedence.xml

@@ -144,6 +144,13 @@
        <link linkend="language.operators.string">string</link> (as of PHP 8.0.0)
       </entry>
      </row>
+     <row>
+      <entry>left</entry>
+      <entry><literal>|&gt;</literal></entry>
+      <entry>
+       <link linkend="language.operators.functional">pipe</link>
+      </entry>
+     </row>
      <row>
       <entry>non-associative</entry>
       <entry>
@@ -282,6 +289,13 @@
        <link linkend="language.operators.logical">logical</link>
       </entry>
      </row>
+     <row>
+      <entry>(n/a)</entry>
+      <entry><literal>throw</literal></entry>
+      <entry>
+       <link linkend="language.exceptions">throw</link>
+      </entry>
+     </row>
     </tbody>
    </tgroup>
   </table>