change: use `mamba` instead of `conda` consistently
@@ -53,11 +53,11 @@ Update your environment regularly to the latest versions of these tools.
```bash
# Update Conda and Mamba.
-conda update -n base conda mamba
+mamba update -n base conda mamba
# Update tools in the Nextstrain environment.
conda activate nextstrain
-conda update --all
+mamba update --all
```
## 2. Download the ncov workflow
