fix: remove empty header rows from both tables

Author: ochafik

README.md

@@ -56,9 +56,9 @@ Or edit your `package.json` manually:
 
 ## Examples
 
-|                                                                                                                                     |                                                                                                                                         |                                                                                                                                                        |
-| :---------------------------------------------------------------------------------------------------------------------------------: | :-------------------------------------------------------------------------------------------------------------------------------------: | :----------------------------------------------------------------------------------------------------------------------------------------------------: |
-|            [![Map](examples/map-server/grid-cell.png "Interactive 3D globe viewer using CesiumJS")](examples/map-server)            |              [![Three.js](examples/threejs-server/grid-cell.png "Interactive 3D scene renderer")](examples/threejs-server)              |                  [![ShaderToy](examples/shadertoy-server/grid-cell.png "Real-time GLSL shader renderer")](examples/shadertoy-server)                   |
+| | | |
+|:---:|:---:|:---:|
+| [![Map](examples/map-server/grid-cell.png "Interactive 3D globe viewer using CesiumJS")](examples/map-server) | [![Three.js](examples/threejs-server/grid-cell.png "Interactive 3D scene renderer")](examples/threejs-server) | [![ShaderToy](examples/shadertoy-server/grid-cell.png "Real-time GLSL shader renderer")](examples/shadertoy-server) |
 |                                                   [**Map**](examples/map-server)                                                    |                                                 [**Three.js**](examples/threejs-server)                                                 |                                                       [**ShaderToy**](examples/shadertoy-server)                                                       |
 |       [![Sheet Music](examples/sheet-music-server/grid-cell.png "ABC notation to sheet music")](examples/sheet-music-server)        |   [![Wiki Explorer](examples/wiki-explorer-server/grid-cell.png "Wikipedia link graph visualization")](examples/wiki-explorer-server)   |             [![Cohort Heatmap](examples/cohort-heatmap-server/grid-cell.png "Customer retention heatmap")](examples/cohort-heatmap-server)             |
 |                                           [**Sheet Music**](examples/sheet-music-server)                                            |                                           [**Wiki Explorer**](examples/wiki-explorer-server)                                            |                                                  [**Cohort Heatmap**](examples/cohort-heatmap-server)                                                  |