Bump maxVersion to 26.0a1

Author: piroor

install.rdf

@@ -169,7 +169,7 @@
     <em:targetApplication>
       <RDF:Description em:id="{ec8030f7-c20a-464f-9b0e-13a3a9e97384}"
                        em:minVersion="10.0"
-                       em:maxVersion="25.0a1" />
+                       em:maxVersion="26.0a1" />
     </em:targetApplication>
   </RDF:Description>
 </RDF:RDF>