Add ona ai automation create/update/list instructions to README

Co-authored-by: Ona <no-reply@ona.com>

Author: meysholdt

README.md

@@ -199,7 +199,32 @@ Copy the two automation files into your repo:
 
 Adjust the agent prompts if your project uses a different build tool (e.g., replace `./mvnw` with `./gradlew` or `npm`).
 
-Trigger them manually from the Ona dashboard. Each run picks the highest-severity open alert, fixes it, and opens a PR.
+#### Install automations
+
+Use the Ona CLI to register each automation:
+
+```bash
+ona ai automation create .ona/fix-dependabot-alert.yaml
+ona ai automation create .ona/fix-codescan-alert.yaml
+```
+
+#### Update automations
+
+After editing a YAML file, update the registered automation. First find the automation ID:
+
+```bash
+ona ai automation list
+```
+
+Then apply the updated file:
+
+```bash
+ona ai automation update <automation-id> .ona/fix-dependabot-alert.yaml
+```
+
+#### Run automations
+
+Trigger them manually from the Ona dashboard or via the CLI. Each run picks the highest-severity open alert, fixes it, and opens a PR.
 
 ## License