Merge pull request #56 from unicornx/dev-update-duo

updated board info for duo family boards

Author: rpsene

Diff for: README.md

@@ -176,7 +176,9 @@ Explore open RISC-V implementations for hands-on learning.
 | [**LicheePi Console 4A**](https://wiki.sipeed.com/hardware/en/lichee/th1520/lcon4a/lcon4a.html) | Sipeed | TH1520 | Quad-Core T-HEAD C910 | 2024-31-10 |
 | [**LicheePi 3A**](https://wiki.sipeed.com/hardware/en/lichee/K1/lpi3a/1_intro.html) | Sipeed | SpacemiT K1 | Octa-Core X60 | 2024-31-10 |
 | [**VisionFive 2**](https://www.starfivetech.com/en/site/boards) | StarFiveTech | JH7110 | Quad-Core Sifive u74 | 2024-31-10 |
-| [**Milk-V Duo**](https://milkv.io/duo) | Milk-V | SG2002 | T-HEAD C906 | 2024-31-10 |
+| [**Milk-V Duo**](https://milkv.io/docs/duo/getting-started/duo) | Milk-V | CV1800B | T-HEAD C906 | 2024-31-10 |
+| [**Milk-V Duo256M**](https://milkv.io/docs/duo/getting-started/duo256m) | Milk-V | SG2002 | T-HEAD C906 | 2024-31-10 |
+| [**Milk-V Duo S**](https://milkv.io/docs/duo/getting-started/duos) | Milk-V | SG2000 | T-HEAD C906 | 2024-31-10 |
 | [**Milk-V Mars**](https://milkv.io/mars) | Milk-V | JH7110 | Quad-Core Sifive u74 | 2024-31-10 |
 | [**Milk-V Meles**](https://milkv.io/meles) | Milk-V | TH1520 | Quad-Core T-HEAD C910 | 2024-31-10 |
 | [**Milk-V Pioneer**](https://milkv.io/pioneer) | Milk-V | SG2042 | 64 Cores T-HEAD C910 | 2024-31-10 |