intro avail docs: proofing corrections

- manually merging latest proofing corrections from
  openSUSE/doc-kit@fd60951
  (current file is specific for SLES for SAP, therefore shared content
   with doc-kit file has to be synced manually)

xml/common_intro_available_doc.xml

@@ -75,7 +75,7 @@
    <!--based on 'Support Resources' listed at https://www.suse.com/support/kb/-->
    <listitem>
     <para>
-     If you have run into an issue, also check out the Technical Information
+     If you run into an issue, check out the Technical Information
      Documents (TIDs) that are available online at <link xlink:href="https://www.suse.com/support/kb/"/>.
      Search the &suse; Knowledgebase for known solutions driven by customer need.
      </para>