Add documentation on how an user can update their version (#7)

Co-authored-by: Anita Caron <[email protected]>

README.md

@@ -32,3 +32,16 @@ ontologies:
       preferredPrefix:
       base_ns: Base namespaces
 ```
+
+# How to update your version of this template
+
+We don't plan to make big changes on this template anymore. The only important change we did was to update the ODK version used in the [GitHub Action](https://github.com/OBOFoundry/dashboard-template/blob/ddde5f42bb2638ed3b07e781923a2a7e3285cc31/.github/workflows/dashboard.yaml#L13-L15
+) that updates the dashboard.
+
+```yaml
+dashboard:
+    runs-on: ubuntu-latest
+    container: obolibrary/odkfull:latest
+```
+
+The easiest way to update your repository is to do so manually. Please update the ODK version to have the latest changes on the OBO Dashboard.