add release docs for v0.5.0

docs/release_notes/v0.5.0.md

@@ -0,0 +1,45 @@
+# Release v0.5.0
+
+Add Helm Chart as a resource.
+
+Use either HTTP sources...
+
+```yaml
+apiVersion: delivery.crd-bootstrap/v1alpha1
+kind: Bootstrap
+metadata:
+  name: bootstrap-sample-helm
+  namespace: crd-bootstrap-system
+spec:
+  interval: 10s
+  source:
+    helm:
+      chartReference: https://ibm.github.io/helm101/
+      chartName: guestbook
+  version:
+    semver: 0.2.1
+
+```
+
+
+Or an OCI source:
+
+```yaml
+apiVersion: delivery.crd-bootstrap/v1alpha1
+kind: Bootstrap
+metadata:
+  name: bootstrap-sample-helm
+  namespace: crd-bootstrap-system
+spec:
+  interval: 10s
+  source:
+    helm:
+      chartReference: oci://ghcr.io/skarlso/helm/crd-bootstrap
+      chartName: crd-bootstrap
+  version:
+    semver: v0.4.2
+```
+
+Either way, the helm chart needs to have the crds in a folder called `crds`.
+
+For now, only public sources will work that have no authentication.