Fix T89870: Vertex groups lost when opening 3.0 files in 2.93

The original refactor for vertex groups (3b6ee8cee7)
forgot to bump the minimum file requirement.

I'm also bumping the subversion to 12 so everyone can switch to a
working subversion number.

Differential Revision: https://developer.blender.org/D11931

source/blender/blenkernel/BKE_blender_version.h

@@ -39,13 +39,13 @@ extern "C" {
 
 /* Blender file format version. */
 #define BLENDER_FILE_VERSION BLENDER_VERSION
-#define BLENDER_FILE_SUBVERSION 11
+#define BLENDER_FILE_SUBVERSION 12
 
 /* Minimum Blender version that supports reading file written with the current
  * version. Older Blender versions will test this and show a warning if the file
  * was written with too new a version. */
-#define BLENDER_FILE_MIN_VERSION 290
-#define BLENDER_FILE_MIN_SUBVERSION 0
+#define BLENDER_FILE_MIN_VERSION 300
+#define BLENDER_FILE_MIN_SUBVERSION 11
 
 /** User readable version string. */
 const char *BKE_blender_version_string(void);