docs(how-to-guides): update Kind validation guide with latest Locust image and streamline installation

Update Locust image version from 2.20.0 to 2.43.3, remove redundant Linux installation instructions for Kind, and simplify Helm install command formatting.

Author: AbdelrhmanHamouda

docs/how-to-guides/validate-with-kind.md

@@ -41,10 +41,6 @@ Ensure you have installed:
     # macOS (using Homebrew)
     brew install kubectl helm kind
 
-    # Linux
-    curl -Lo ./kind https://kind.sigs.k8s.io/dl/latest/kind-linux-amd64
-    chmod +x ./kind
-    sudo mv ./kind /usr/local/bin/kind
 
     # Verify installations
     kubectl version --client
@@ -63,8 +59,7 @@ kind create cluster --name locust-test
 # 2. Install operator
 helm repo add locust-k8s-operator https://abdelrhmanhamouda.github.io/locust-k8s-operator/
 helm repo update
-helm install locust-operator locust-k8s-operator/locust-k8s-operator \
-  --namespace locust-system --create-namespace
+helm install locust-operator locust-k8s-operator/locust-k8s-operator --namespace locust-system --create-namespace
 
 # 3. Create test
 kubectl create configmap demo-test --from-literal=demo_test.py='
@@ -82,7 +77,7 @@ kind: LocustTest
 metadata:
   name: demo
 spec:
-  image: locustio/locust:2.20.0
+  image: locustio/locust:2.43.3
   testFiles:
     configMapRef: demo-test
   master:
@@ -214,7 +209,7 @@ kind: LocustTest
 metadata:
   name: demo
 spec:
-  image: locustio/locust:2.20.0
+  image: locustio/locust:2.43.3
   testFiles:
     configMapRef: demo-test
   master: