fix: Fixed a typo in the example code.

website/asciidoc/modules/users/pages/tools/opm.adoc

@@ -92,7 +92,7 @@ This creates a connection to the database, reads all the values and then disconn
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 public static void main(String[] args) {
     PlcEntityManager em = new PlcEntityManager();
-    MyEntity entity = em.connect(MyEntity.class, "s7://...");
+    MyEntity entity = em.read(MyEntity.class, "s7://...");
     System.out.println(entity.getPressure());
 }
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