Add developers@openfedem.org as contact for technical issues

src/UsersGuide/learning_basics.tex

@@ -230,8 +230,8 @@ \subsubsection{Predefined template files}
 \Tip{If abnormal behavior occurs, or if Fedem stops responding,
   check the console window (if activated) and the Output List
   (discussed later) for important information.
-  Take note of any errors or warnings before contacting the OpenFEDEM Core Team
-  (see \href{https://openfedem.org/}{openfedem.org}).}
+  Take note of any errors or warnings before contacting the OpenFEDEM team
+(\href{mailto:developers@openfedem.org}{\nolinkurl{developers@openfedem.org}}).}
 
 After finishing some initial setup tasks, the Fedem GUI main window will appear.
 In the following sections, the Fedem GUI is described in detail.
@@ -1551,7 +1551,7 @@ \subsubsection{Line width}
 If any problems are encountered during model loading, Fedem displays
 a message box and provides additional information in the \OutputList view.
 
-\Tip{If you are working on several model files at the same time, FEDEM will
+\Tip{If you are working on several model files at the same time, Fedem will
   maintain a list of the 10 most recently opened models in the current session.
   This list is available in the \textbf{Recent models} sub-menu under the
   \textbf{File} menu. You can then open any of these models without