Fix: leftover version string

Author: ZigaMr

docs/build/tools/foundry.mdx

@@ -94,7 +94,7 @@ available in the **Sapphire foundry** package.
 
    [dependencies]
    "@oasisprotocol-sapphire-contracts" = "0.2.14"
-   "@oasisprotocol-integrations-foundry~0.1.1" = "0.1.1"
+   "@oasisprotocol-integrations-foundry" = "0.1.1"
    // highlight-end
    ```