libobs: Update version from latest tag

Originally, the build numbers 21.1.1 and  21.1.2 weren't added to the
master branch -- only to the two bugfix tag branches.  This is being
added again in order to build some test builds that don't prompt for
update.

libobs/obs-config.h

@@ -41,7 +41,7 @@
  *
  * Reset to zero each major or minor version
  */
-#define LIBOBS_API_PATCH_VER  0
+#define LIBOBS_API_PATCH_VER  2
 
 #define MAKE_SEMANTIC_VERSION(major, minor, patch) \
                              ((major << 24) | \