Expand "Intel" GL_VENDOR check for workaround

Fix #7444 maybe

common/gal/opengl/cached_container_gpu.cpp

@@ -59,8 +59,10 @@ CACHED_CONTAINER_GPU::CACHED_CONTAINER_GPU( unsigned int aSize ) :
 
     wxString vendor( glGetString( GL_VENDOR ) );
 
-    // workaround for intel GPU drivers: disable glCopyBuffer, causes crashes/freezes on
-    // certain driver versions
+    // workaround for intel GPU drivers:
+    // disable glCopyBuffer, causes crashes/freezes on certain driver versions
+    // Note, Intel's GL_VENDOR string varies depending on GPU/driver generation
+    // But generally always starts with Intel at least
     if( vendor.Contains( "Intel" ) || vendor.Contains( "etnaviv" ) )
     {
         m_useCopyBuffer = false;