docs(generated): add ddoc filter known issue

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- Specification version 1.0.0-dev0.1.5
- Automation (cloudant-sdks) version 7a2df44

Signed-off-by: cloudant-sdks-automation <[email protected]>

KNOWN_ISSUES.md

@@ -71,6 +71,33 @@ Example JSON request body:
 * Manually setting an `Accept-Encoding` header on requests will disable the transparent gzip decompression of response bodies from the server.
 * Manually setting a `Content-Encoding` header on requests will disable the transparent gzip compression of request bodies to the server.
 
+### Changes feed
+
+#### Filter functions
+
+The SDK does not support passing user-defined query or body parameters in `_changes` requests for dynamic filter functions in design documents. 
+The workaround and recommended option is to use a `selector` type filter.
+For example, if you are using a `_changes` request like `/{db}/_changes?filter=myDdoc/byName&name=Jane` with a filter function like:
+```javascript
+function(doc, req) {
+    if (doc.name !== req.query.name) {
+        return false;
+    }
+    return true; 
+}
+```
+It can be replaced with a request using a selector filter:
+```js
+const service = CloudantV1.newInstance({});
+
+service.postChanges({
+  db: 'example',
+  filter: '_selector',
+  selector: {"name": "Jane"}
+}).then(response => { ... });
+```
+
+
 ## Cloudant SDK for Node.js
 <!-- KNOWN_ISSUES specific to Node -->
 ### Disabling request body compression