docs: Use markdown emphasize-syntax in demo documentation (#3786)

Signed-off-by: Sascha <[email protected]>

demo/agilebank/README.md

@@ -1,9 +1,11 @@
-> NOTE: 
-Be sure to look at the [prerequisite](https://open-policy-agent.github.io/gatekeeper/website/docs/install#prerequisites) and Gatekeeper [installation](https://open-policy-agent.github.io/gatekeeper/website/docs/install#installation) steps before attempting to run the script. 
+> [!NOTE]
+> Be sure to look at the [prerequisite](https://open-policy-agent.github.io/gatekeeper/website/docs/install#prerequisites) and Gatekeeper [installation](https://open-policy-agent.github.io/gatekeeper/website/docs/install#installation) steps before attempting to run the script. 
 
-> NOTE: Use the latest version of Gatekeeper as some of the features are only available in the latest Gatekeeper release and some of the features are only compatible with Kubernetes v1.19+.
+> [!NOTE]
+> Use the latest version of Gatekeeper as some of the features are only available in the latest Gatekeeper release and some of the features are only compatible with Kubernetes v1.19+.
 
-> TIP: If you are new to k8s, you can stand up a simple cluster using [kind](https://kind.sigs.k8s.io/docs/user/quick-start/): `kind create cluster`.
+> [!TIP]
+> If you are new to k8s, you can stand up a simple cluster using [kind](https://kind.sigs.k8s.io/docs/user/quick-start/): `kind create cluster`.
 
 This is a demo involving a fictitious bank named Agile Bank.
 

demo/basic/README.md

@@ -1,6 +1,8 @@
-> NOTE: Be sure to look at the [prerequisite](https://open-policy-agent.github.io/gatekeeper/website/docs/install#prerequisites) and Gatekeeper [installation](https://open-policy-agent.github.io/gatekeeper/website/docs/install#installation) steps before attempting to run the script.
+> [!NOTE]
+> Be sure to look at the [prerequisite](https://open-policy-agent.github.io/gatekeeper/website/docs/install#prerequisites) and Gatekeeper [installation](https://open-policy-agent.github.io/gatekeeper/website/docs/install#installation) steps before attempting to run the script.
 
-> TIP: If you are new to k8s, you can stand up a simple cluster using [kind](https://kind.sigs.k8s.io/docs/user/quick-start/): `kind create cluster`.
+> [!TIP]
+> If you are new to k8s, you can stand up a simple cluster using [kind](https://kind.sigs.k8s.io/docs/user/quick-start/): `kind create cluster`.
 
 Demo of basic Gatekeeper functionality.