Bug 492908: pluginClasspathContributors typo

There's a small typo in the pluginClasspathContributors extension point schema.

Bug: 492908
Signed-off-by: Ben Cox <benjamin.cox@uk.ibm.com>
diff --git a/ui/org.eclipse.pde.core/schema/pluginClasspathContributors.exsd b/ui/org.eclipse.pde.core/schema/pluginClasspathContributors.exsd
index 11b06d7..c9a9aef 100644
--- a/ui/org.eclipse.pde.core/schema/pluginClasspathContributors.exsd
+++ b/ui/org.eclipse.pde.core/schema/pluginClasspathContributors.exsd
@@ -84,9 +84,9 @@
 &lt;pre&gt;
   &lt;extension
     point=&quot;org.eclipse.pde.core.pluginClasspathContributors&quot;&gt;
-    &lt;contribtor
+    &lt;contributor
       class=&quot;at.bestsolution.efxclipse.tooling.pde.core.JavaFXClassPathExtender&quot;&gt;
-    &lt;/contribtor&gt;
+    &lt;/contributor&gt;
   &lt;/extension&gt;
 &lt;/pre&gt;
 &lt;/p&gt;