updated readme (#699)

Author: mdvillagra

README.md

@@ -35,8 +35,8 @@ List of symbols:
 | BLS12-381       | :heavy_check_mark: | :heavy_check_mark: |     |                    |             |
 | BLS12-377       | 🏗️           | :heavy_check_mark: |     | :heavy_check_mark: |             |
 | BN-254          | :x:                | :heavy_check_mark: |     |                    |             |
-| Pallas          | :x:                | :heavy_check_mark: |     |                    |             |
-| Vesta           | :x:                | :heavy_check_mark: |     |                    |             |
+| Pallas          | 🏗️                | :heavy_check_mark: |     |                    |             |
+| Vesta           | 🏗️                | :heavy_check_mark: |     |                    |             |
 | Bandersnatch    | 🏗️           | :heavy_check_mark: |     |                    |             |
 | **STARKs**       | **Lambdaworks** | **Arkworks** | **Halo2** | **gnark** | **Constantine** |
 | STARK Prover | :heavy_check_mark: | :x:      |     | :x:   |             |