Bump manifest versions

modules/AppearanceAPI/src/main/nbm/manifest.mf

 Manifest-Version: 1.0
 AutoUpdate-Essential-Module: true
 OpenIDE-Module-Localizing-Bundle: org/gephi/appearance/Bundle.properties
-OpenIDE-Module-Specification-Version: 0.9.1.7
+OpenIDE-Module-Specification-Version: 0.9.1.8
 OpenIDE-Module-Display-Category: Gephi Core
 OpenIDE-Module-Name: Appearance API

modules/DesktopDataLaboratory/src/main/nbm/manifest.mf

@@ -2,6 +2,6 @@ Manifest-Version: 1.0
 AutoUpdate-Essential-Module: true
 OpenIDE-Module-Layer: org/gephi/desktop/datalab/layer.xml
 OpenIDE-Module-Localizing-Bundle: org/gephi/desktop/datalab/Bundle.properties
-OpenIDE-Module-Specification-Version: ${gephi.modules.specification.version}
+OpenIDE-Module-Specification-Version: 0.9.1.1
 OpenIDE-Module-Display-Category: Gephi UI
 OpenIDE-Module-Name: Desktop Data Laboratory

modules/DesktopFilters/src/main/nbm/manifest.mf

 Manifest-Version: 1.0
 AutoUpdate-Essential-Module: true
 OpenIDE-Module-Localizing-Bundle: org/gephi/desktop/filters/Bundle.properties
-OpenIDE-Module-Specification-Version: ${gephi.modules.specification.version}
+OpenIDE-Module-Specification-Version: 0.9.1.1
 OpenIDE-Module-Display-Category: Gephi UI
 OpenIDE-Module-Name: Desktop Filters