Fix experimental feature flag name in docs and conformance makefile (#1624)

Fix experimental feature flag name in docs and conformance makefile

Author: ciarams87

conformance/Makefile

@@ -38,7 +38,7 @@ create-kind-cluster: ## Create a kind cluster
 
 .PHONY: update-ngf-manifest
 update-ngf-manifest: ## Update the NGF deployment manifest image names and imagePullPolicies
-	cd .. && make generate-manifests HELM_TEMPLATE_EXTRA_ARGS_FOR_ALL_MANIFESTS_FILE="--set nginxGateway.kind=skip" HELM_TEMPLATE_COMMON_ARGS="--set nginxGateway.image.repository=$(PREFIX) --set nginxGateway.image.tag=$(TAG) --set nginxGateway.image.pullPolicy=Never --set nginx.image.repository=$(NGINX_PREFIX) --set nginx.image.tag=$(TAG) --set nginx.image.pullPolicy=Never --set nginxGateway.experimentalFeatures.enable=$(ENABLE_EXPERIMENTAL)" && cd -
+	cd .. && make generate-manifests HELM_TEMPLATE_EXTRA_ARGS_FOR_ALL_MANIFESTS_FILE="--set nginxGateway.kind=skip" HELM_TEMPLATE_COMMON_ARGS="--set nginxGateway.image.repository=$(PREFIX) --set nginxGateway.image.tag=$(TAG) --set nginxGateway.image.pullPolicy=Never --set nginx.image.repository=$(NGINX_PREFIX) --set nginx.image.tag=$(TAG) --set nginx.image.pullPolicy=Never --set nginxGateway.gwAPIExperimentalFeatures.enable=$(ENABLE_EXPERIMENTAL)" && cd -
 
 .PHONY: update-ngf-manifest-with-plus
 update-ngf-manifest-with-plus: ## Update the NGF deployment manifest image names and imagePullPolicies including nginx-plus

site/content/installation/installing-ngf/helm.md

@@ -115,7 +115,7 @@ We support a subset of the additional features provided by the Gateway API exper
 experimental features of Gateway API which are supported by NGINX Gateway Fabric:
 
 ```shell
-helm install ngf oci://ghcr.io/nginxinc/charts/nginx-gateway-fabric --create-namespace -n nginx-gateway --set nginxGateway.experimentalFeatures.enable=true
+helm install ngf oci://ghcr.io/nginxinc/charts/nginx-gateway-fabric --create-namespace -n nginx-gateway --set nginxGateway.gwAPIExperimentalFeatures.enable=true
 ```
 
 {{<note>}}Requires the Gateway APIs installed from the experimental channel.{{</note>}}