Update compatibility.mdx

Add NEL to Data Localisation compatibility matrix

Author: simon-says

src/content/docs/data-localization/compatibility.mdx

@@ -25,6 +25,7 @@ The table below provides a summary of the Data Localization Suite product's beha
 | HTTP/3 (with QUIC)                         | ⚫️             | ✘                 | ⚫️                        |
 | Image Resizing                             | ✅              | ✅ [^6]           | 🚧 [^1]                    |
 | Load Balancing                             | ✅              | ✅                | 🚧 [^1]                    |
+| Network Error Logging (NEL)                | ⚫️              | ⚫️                 | ✘                         |
 | Onion Routing                              | ✘               | ✘                 | ✘                          |
 | Orange-to-Orange (O2O)                     | ✘               | ✘                 | ✘                          |
 | Stream Delivery                            | ✅              | ✅                | ✅                         |