[bindgen] Expose Obj::add_int() (#7797)

* Expose 'add_int()'.

* Add CHANGELOG entry.

CHANGELOG.md

@@ -1,10 +1,9 @@
 # NEXT RELEASE
 
 ### Enhancements
-* <New feature description> (PR [#????](https://github.com/realm/realm-core/pull/????))
 * It is no longer an error to set a base url for an App with a trailing slash - for example, `https://services.cloud.mongodb.com/` instead of `https://services.cloud.mongodb.com` - before this change that would result in a 404 error from the server ([PR #7791](https://github.com/realm/realm-core/pull/7791)).
 * Performance has been improved for range queries on integers and timestamps. Requires that you use the "BETWEEN" operation in MQL or the Query::between() method when you build the query. (PR [#7785](https://github.com/realm/realm-core/pull/7785))
-* None.
+* Expose `Obj::add_int()` in the bindgen spec. ([PR #7797](https://github.com/realm/realm-core/pull/7797)).
 
 ### Fixed
 * <How do the end-user experience this issue? what was the impact?> ([#????](https://github.com/realm/realm-core/issues/????), since v?.?.?)

bindgen/spec.yml

@@ -808,6 +808,7 @@ classes:
         - sig: '(column: ColKey, value: Mixed, is_default: bool)'
           suffix: with_default
       set_collection: '(column: ColKey, type: CollectionType) -> Obj'
+      add_int: '(column: ColKey, value: int64_t) -> Obj'
       get_linked_object: '(column: ColKey) const -> Nullable<Obj>'
       to_string: () const -> std::string
       get_backlink_count: '() const -> count_t'