fix sokol-gfx and sokol-app comments regarding GLES3.1 contexts and compute support

sokol_app.h

@@ -334,8 +334,9 @@
 
         int sapp_gl_get_major_version(void)
         int sapp_gl_get_minor_version(void)
-            Returns the major and minor version of the GL context
-            (only for SOKOL_GLCORE, all other backends return zero here, including SOKOL_GLES3)
+        bool sapp_gl_is_gles(void)
+            Returns the major and minor version of the GL context and
+            whether the GL context is a GLES context
 
         const void* sapp_android_get_native_activity(void);
             On Android, get the native activity ANativeActivity pointer, otherwise
@@ -2010,9 +2011,9 @@ SOKOL_APP_API_DECL const void* sapp_wgpu_get_depth_stencil_view(void);
 
 /* GL: get framebuffer object */
 SOKOL_APP_API_DECL uint32_t sapp_gl_get_framebuffer(void);
-/* GL: get major version (only valid for desktop GL) */
+/* GL: get major version */
 SOKOL_APP_API_DECL int sapp_gl_get_major_version(void);
-/* GL: get minor version (only valid for desktop GL) */
+/* GL: get minor version */
 SOKOL_APP_API_DECL int sapp_gl_get_minor_version(void);
 /* GL: return true if the context is GLES */
 SOKOL_APP_API_DECL bool sapp_gl_is_gles(void);

sokol_gfx.h

@@ -711,8 +711,9 @@
 
         - macOS and iOS with Metal
         - Windows with D3D11 and OpenGL
-        - Linux with OpenGL
-        - web with WebGPU
+        - Linux with OpenGL or GLES3.1+
+        - Web with WebGPU
+        - Android with GLES3.1+
 
     ...this means compute shaders can't be used on the following platform/backend
     combos (the same restrictions apply to using storage buffers without compute
@@ -720,8 +721,7 @@
 
         - macOS with GL
         - iOS with GLES3
-        - Android
-        - web with WebGL2
+        - Web with WebGL2
 
     A compute pass is started with:
 
@@ -1185,8 +1185,7 @@
     Storage buffers are *NOT* supported on the following platform/backend combos:
 
     - macOS+GL (because storage buffers require GL 4.3, while macOS only goes up to GL 4.1)
-    - all GLES3 platforms (WebGL2, iOS, Android - with the option that support on
-      Android may be added at a later point)
+    - platforms which only support a GLES3.0 context (WebGL2 and iOS)
 
     To use storage buffers, the following steps are required: