app_ruby: small spelling fix in docs

src/modules/app_ruby/doc/app_ruby_admin.xml

@@ -25,8 +25,8 @@
 	</para>
 	<para>
 		IMPORTANT: because of Ruby language policy (which require that a public
-		submodule name has to start with an uppercase leter), the KSR submodule
-		names are with all leters uppercase. For example, what is documented as
+		submodule name has to start with an uppercase letter), the KSR submodule
+		names are with all letters uppercase. For example, what is documented as
 		KSR.sl in KEMI docs, must be used as KSR::SL in Ruby scripts.
 	</para>
 	</section>