Include fn* in the core-syms that analyze-usages2 checks

e.g. now "(fn* [] 1 2)" now issues an "Unused value: 1" warning,
just like "(fn [] 1 2)" does.

src/clj_kondo/impl/analyzer/usages.clj

@@ -277,7 +277,7 @@
                              (and (not generated?)
                                   core?
                                   (not (:clj-kondo.impl/generated (meta parent-call)))
-                                  (one-of core-sym [do fn defn defn-
+                                  (one-of core-sym [do fn fn* defn defn-
                                                     let when-let loop binding with-open
                                                     doseq try when when-not when-first
                                                     when-some future]))]
@@ -304,7 +304,7 @@
                                   (or core? test?)
                                   (not (:clj-kondo.impl/generated (meta parent-call)))
                                   (if core?
-                                    (one-of core-sym [do fn defn defn-
+                                    (one-of core-sym [do fn fn* defn defn-
                                                       let when-let loop binding with-open
                                                       doseq try when when-not when-first
                                                       when-some future])