fix two typos in rmic manual page

manual/Tasks/rmic.html

@@ -30,7 +30,7 @@
 
 <p><b>Note</b> <kbd>rmic</kbd> has been deprecated as of Java 13 and
   removed as of Java 15. Trying to use it with Java15 will fail unless
-  you specifiy the execxutable or rmic-adapter explicitly.</p>
+  you specify the executable or rmic-adapter explicitly.</p>
 
 <p><code>Rmic</code> can be run on a single class (as specified with the classname attribute) or a
 number of classes at once (all classes below base that are neither <code>_Stub</code>