docs: Update the supported GL version to 4.6

README.md

@@ -17,7 +17,7 @@ Features
 --------
 
   * Automatically initializes as new GL functions are used.
-  * GL 4.5 core and compatibility context support.
+  * GL 4.6 core and compatibility context support.
   * GLES 1/2/3 context support.
   * Knows about function aliases so (e.g.) `glBufferData()` can be
     used with `GL_ARB_vertex_buffer_object` implementations, along

src/dispatch_common.c

@@ -41,7 +41,7 @@
  * \section features_sec Features
  *
  *   - Automatically initializes as new GL functions are used.
- *   - GL 4.4 core and compatibility context support.
+ *   - GL 4.6 core and compatibility context support.
  *   - GLES 1/2/3 context support.
  *   - Knows about function aliases so (e.g.) `glBufferData()` can be
  *     used with `GL_ARB_vertex_buffer_object` implementations, along