fix: update xml authors (#85)

Author: flegastelois

itilcategorygroups.xml

@@ -30,11 +30,7 @@ Potom, pro každou z kategorií požadavku je možné určit která skupina bude
    <issues>https://github.com/pluginsGLPI/itilcategorygroups/issues</issues>
    <readme>https://raw.githubusercontent.com/pluginsGLPI/itilcategorygroups/main/README.md</readme>
    <authors>
-      <author>Teclib'</author>
-      <author>Walid Nouh</author>
-      <author>Alexandre Delaunay</author>
-      <author>Emmanuel Haguet</author>
-      <author>François Legastelois</author>
+      <author>TECLIB</author>
    </authors>
    <versions>
       <version>