Upgrade: Fix inconsistent version numbers in 'Upgrading with plain Zy…

…pper' (BSC#1234288

xml/sle_update_online.xml

@@ -575,14 +575,14 @@ Continue? [y/n/? shows all options] (y):</screen>
 <screen>&prompt.sudo;zypper repos -u</screen>
     <para>
      Update each repository URL so that its product version number is
-     <literal>&product-ga;-SP&product-sp;</literal>. For example, if the URL of
+     <literal>&product-dsc-url-substring;</literal>. For example, if the URL of
      a repository is
     </para>
-<screen>http://rmt.&exampledomain;/repo/SUSE/Products/SLE-15-SP2-Product-SLES/x86_64/product/</screen>
+<screen>http://rmt.&exampledomain;/repo/SUSE/Products/SLE-15-SP3-Product-SLES/x86_64/product/</screen>
     <para>
      change it to
     </para>
-<screen>http://rmt.&exampledomain;/repo/SUSE/Products/SLE-15-SP3-Product-SLES/x86_64/product/</screen>
+<screen>http://rmt.&exampledomain;/repo/SUSE/Products/SLE-&product-dsc-url-substring;-Product-SLES/x86_64/product/</screen>
     <para>
      This needs to be done with all repositories that are enabled. You may want
      to consider also doing this for repositories that are currently disabled,
@@ -609,7 +609,7 @@ Continue? [y/n/? shows all options] (y):</screen>
       <para>
        Then add the corresponding new repository by running
       </para>
-<screen> &prompt.sudo;zypper addrepo -f <replaceable>URL</replaceable> <replaceable>NAME</replaceable>-&product-ga;-SP&product-sp;</screen>
+<screen> &prompt.sudo;zypper addrepo -f <replaceable>URL</replaceable> <replaceable>NAME</replaceable>-&product-dsc-url-substring;</screen>
      </step>
      <step>
       <para>