add title to tables

src/docs/asciidoc/jme3/features.adoc

@@ -57,7 +57,8 @@ See also: <<jme3/requirements#,requirements>>.
 
 == Supported Formats
 
-=== jMonkeyEngine3 File Formats
+[caption=]
+.jMonkeyEngine3 File Formats
 [cols="10,65,25", options="header"]
 |===
 
@@ -87,8 +88,8 @@ a| <<sdk/filters#,Filters>> +
 
 |===
 
-
-=== Supported External File Types
+[caption=]
+.Supported External File Types
 [cols="45,10,45", options="header"]
 |===