OpenGEX: fix lowercase typo for linux.

test/unit/utOpenGEXImportExport.cpp

@@ -52,7 +52,7 @@ class utOpenGEXImportExport : public AbstractImportExportBase {
 public:
     virtual bool importerTest() {
         Assimp::Importer importer;
-        const aiScene *scene = importer.ReadFile( ASSIMP_TEST_MODELS_DIR "/OpenGEX/example.ogex", 0 );
+        const aiScene *scene = importer.ReadFile( ASSIMP_TEST_MODELS_DIR "/OpenGEX/Example.ogex", 0 );
         return nullptr != scene;
 
         return true;