Add ben-parker's mini rack.

Author: geerlingguy

README.md

@@ -293,6 +293,7 @@ If you would like your mini rack added to this list, please open a [new issue](h
 | BlackChar | 2021 | [KALLAX Custom 10" 6U rack (EU)](https://github.com/geerlingguy/mini-rack/issues/70) |
 | lukehoersten | 2025 | [Unifi 2.5Gbps Homelab 9U Mini Rack](https://github.com/geerlingguy/mini-rack/issues/79) |
 | derek-tattersall | 2025 | [Homemade mini-rack](https://github.com/geerlingguy/mini-rack/issues/81) |
+| ben-parker | 2025 | [The "network pile to network rack" mini rack](https://github.com/geerlingguy/mini-rack/issues/89) |
 
 [Browse all issues tagged 'build showcase'](https://github.com/geerlingguy/mini-rack/labels/build%20showcase) (includes in-progress builds).