[JENKINS-73908] Do not show button to upgrade to SystemRead users (#9981

)

Co-authored-by: Daniel Beck <[email protected]>
(cherry picked from commit 530b0ab)

core/src/main/resources/hudson/model/UpdateCenter/CoreUpdateMonitor/message.jelly

@@ -53,11 +53,13 @@ THE SOFTWARE.
       <j:otherwise>
         <j:set var="changelog_url" value="${app.CHANGELOG_URL}"/>
         ${%NewVersionAvailable(ucData.core.version,ucData.core.url,changelog_url)}
-        <j:if test="${ucData.canUpgrade()}">
-        <form method="post" action="${rootURL}/updateCenter/upgrade">
-          <f:submit value="${%Or Upgrade Automatically}"/>
-        </form>
-        </j:if>
+        <l:isAdmin>
+          <j:if test="${ucData.canUpgrade()}">
+            <form method="post" action="${rootURL}/updateCenter/upgrade">
+              <f:submit value="${%Or Upgrade Automatically}"/>
+            </form>
+          </j:if>
+        </l:isAdmin>
       </j:otherwise>
     </j:choose>
   </div>