fix conv table (#256)

Author: CarloLucibello

docs/src/api/conv.md

@@ -15,11 +15,11 @@ The table below lists all graph convolutional layers implemented in the *GraphNe
 
 | Layer                       |Sparse Ops|Edge Weight|Edge Features| 
 | :--------                   |  :---:   |:---:      |:---:        |               
-| [`AGNNConv`](@ref)          |          |           |    ✓        |
-| [`CGConv`](@ref)            |          |           |             |
+| [`AGNNConv`](@ref)          |          |           |     ✓       |
+| [`CGConv`](@ref)            |          |           |     ✓       |
 | [`ChebConv`](@ref)          |          |           |             |
-| [`EdgeConv`](@ref)          |          |           |             |
 | [`EGNNConv`](@ref)          |          |           |     ✓       |
+| [`EdgeConv`](@ref)          |          |           |             |
 | [`GATConv`](@ref)           |          |           |     ✓       |
 | [`GATv2Conv`](@ref)         |          |           |     ✓       |
 | [`GatedGraphConv`](@ref)    |     ✓    |           |             |