Update documentation for generating RELAX NG from XML

Signed-off-by: Jessica He <jhe@redhat.com>

Author: JessicaJHee

docs/BindingWithGrammar.md

@@ -137,4 +137,12 @@ When an unbound XML file is open, a Document Type Definition/DTD file can be gen
 
 With the cursor on the first opening tag, use `Ctrl + .` or `Quick Fix...` or the lightbulb that appears and select "Generate foo.dtd and bind with *" to create the file in the the same directory.
 
-![GenerateDTDFromXML](./images/BindingWithGrammar/GenerateDTDFromXML.gif)
+![GenerateDTDFromXML](./images/BindingWithGrammar/GenerateDTDFromXML.gif)
+
+#### Generate RELAX NG from XML
+
+When an unbound XML file is open, a RELAX NG schema can be generated from the opening tag in the XML file.
+
+With the cursor on the first opening tag, use `Ctrl + .` or `Quick Fix...` or the lightbulb that appears and select "Generate foo.rng and bind with RelaxNG" to create the file in the the same directory.
+
+![GenerateRelaxNGFromXML](./images/BindingWithGrammar/GenerateRelaxNGFromXML.gif)

docs/Features/RelaxNGFeatures.md

@@ -141,4 +141,10 @@ The following file, `addressBook.xml`, references `addressBook.rng` using the `x
     <email></email>
   </card>
 </addressBook> 
-```
+```
+
+# Generate RELAX NG from XML
+
+When an unbound XML file is open, a RELAX NG schema can be generated from the opening tag in the XML file.
+
+See: [Generate RELAX NG from XML](../BindingWithGrammar.md#generate-relax-ng-from-xml).