Update openapi-diff.yml

Author: bc-devrev

.github/workflows/openapi-diff.yml

@@ -22,8 +22,13 @@ jobs:
     - name: Run OpenAPI Diff for public (from HEAD rev)
       uses: docker://openapitools/openapi-diff:latest 
       with:
-        args: --markdown public-diff.md base/fern/apis/public/openapi-public.yaml head/fern/apis/public/openapi-public.yaml
+        args: --markdown changelog/public-diff.md base/fern/apis/public/openapi-public.yaml head/fern/apis/public/openapi-public.yaml
     - name: Run OpenAPI Diff for beta (from HEAD rev)
       uses: docker://openapitools/openapi-diff:latest 
       with:
-        args: --markdown beta-diff.md base/fern/apis/beta/openapi-beta.yaml head/fern/apis/beta/openapi-beta.yaml
+        args: --markdown changelog/beta-diff.md base/fern/apis/beta/openapi-beta.yaml head/fern/apis/beta/openapi-beta.yaml
+    - name: Archive changelogs
+      uses: actions/upload-artifact@v4
+      with:
+        name: changelog
+        path: changelog/**