update version to 3.1.2

bundles/org.eclipse.core.resources/META-INF/MANIFEST.MF

diff --git a/bundles/org.eclipse.core.resources/META-INF/MANIFEST.MF b/bundles/org.eclipse.core.resources/META-INF/MANIFEST.MF
index 595bd55..c5b6429 100644
--- a/bundles/org.eclipse.core.resources/META-INF/MANIFEST.MF
+++ b/bundles/org.eclipse.core.resources/META-INF/MANIFEST.MF
@@ -2,7 +2,7 @@
 Bundle-ManifestVersion: 2
 Bundle-Name: %pluginName
 Bundle-SymbolicName: org.eclipse.core.resources; singleton:=true
-Bundle-Version: 3.1.1
+Bundle-Version: 3.1.2
 Bundle-Activator: 
  org.eclipse.core.internal.compatibility.PluginActivator
 Bundle-Vendor: %providerName