UI: Fix link to TAS help page

Tools -> TAS -> Configure TAS

Thanks to Rei on discord for the fix.

Basically: openExternalLinks is a checkbox in Qt Creator

src/yuzu/configuration/configure_tas.ui

@@ -16,6 +16,9 @@
           <property name="text">
            <string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p&gt;Reads controller input from scripts in the same format as TAS-nx scripts.&lt;br/&gt;For a more detailed explanation, please consult the &lt;a href=&quot;https://yuzu-emu.org/help/feature/tas/&quot;&gt;&lt;span style=&quot; text-decoration: underline; color:#039be5;&quot;&gt;help page&lt;/span&gt;&lt;/a&gt; on the yuzu website.&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
           </property>
+          <property name="openExternalLinks">
+           <bool>true</bool>
+          </property>
          </widget>
         </item>
         <item row="1" column="0" colspan="4">