Iterate on Air Gap Toc label

Signed-off-by: Alex Ellis (OpenFaaS Ltd) <alexellis2@gmail.com>

Author: alexellis

docs/edge/overview.md

@@ -15,6 +15,7 @@ Most of the [OpenFaaS Pro documentation](/docs/openfaas-pro/) and [Helm charts](
 * [GPU support for services](/edge/gpus)
 * [Improve container security with gVisor](/edge/gvisor)
 * [OpenTelemetry](/edge/open-telemetry)
+* [Air Gap](/edge/airgap)
 
 ## Looking for something else?
 

mkdocs.yml

@@ -168,7 +168,7 @@ nav:
       - RabbitMQ events: ./openfaas-pro/rabbitmq-events.md
       - Google Cloud PubSub events: ./openfaas-pro/pubsub-events.md
       # - Federated Gateway: ./openfaas-pro/federated-gateway.md
-      - Airgapped installation: ./openfaas-pro/airgap.md
+      - Air Gap: ./openfaas-pro/airgap.md
       - Function Builder API: ./openfaas-pro/builder.md
       - Billing metrics: ./openfaas-pro/billing-metrics.md
       - Grafana dashboards: ./openfaas-pro/grafana-dashboards.md
@@ -183,7 +183,7 @@ nav:
       - GPU for services: ./edge/gpus.md
       - gVisor: ./edge/gvisor.md
       - OpenTelemetry: ./edge/open-telemetry.md
-      - Air gap installation: ./edge/airgap.md
+      - Air Gap: ./edge/airgap.md
   - Reference:
     - OpenFaaS YAML: ./reference/yaml.md
     - REST API: ./reference/rest-api.md