docs: buildkite lima setup needs --mount-writable (#6833) [skip ci]

docs/content/developers/buildkite-testmachine-setup.md

@@ -170,9 +170,9 @@ We are using [Buildkite](https://buildkite.com/ddev) for Windows and macOS testi
 
 Then the Buildkite agent must be configured with tags `colima=true` and `colima_vz=true`.
 
-## Additional Lima macOS setup (not yet working)
+## Additional Lima macOS setup
 
-1. `limactl create --name=lima-vz --vm-type=vz --mount-type=virtiofs --mount="~/:w" --memory=6 --cpus=4 --disk=100 template://docker`
+1. `limactl create --name=lima-vz --vm-type=vz --mount-type=virtiofs --mount-writable --mount="~/:w" --memory=6 --cpus=4 --disk=100 template://docker`
 2. `limactl start lima-vz`
 3. `docker context use lima-lima-vz`