[post-release] Add OLM digest bundle for v0.38.0 in 0.38.x

Signed-off-by: David Kwon <dakwon@redhat.com>

Author: dkwon17

olm-catalog/release-digest/channel.yaml

@@ -51,3 +51,5 @@ entries:
     skipRange: '>=0.35.0 <0.35.1'
   - name: devworkspace-operator.v0.37.0
     replaces: devworkspace-operator.v0.36.0
+  - name: devworkspace-operator.v0.38.0
+    replaces: devworkspace-operator.v0.37.0