added changelog

Signed-off-by: Kartikay <kartikay_2101ce32@iitp.ac.in>

CHANGELOG.md

@@ -40,7 +40,7 @@ We use *breaking :warning:* to mark changes that are not backward compatible (re
 - [#6887](https://github.com/thanos-io/thanos/pull/6887) Query Frontend: *breaking :warning:* Add tenant label to relevant exported metrics. Note that this change may cause some pre-existing custom dashboard queries to be incorrect due to the added label.
 - [#7028](https://github.com/thanos-io/thanos/pull/7028) Query|Query Frontend: Add new `--query-frontend.enable-x-functions` flag to enable experimental extended functions.
 - [#6884](https://github.com/thanos-io/thanos/pull/6884) Tools: Add upload-block command to upload blocks to object storage.
-
+- [#7080](https://github.com/thanos-io/thanos/pull/7080) Rule: Added a new flag for max-source-resolution.
 ### Changed
 
 - [#6539](https://github.com/thanos-io/thanos/pull/6539) Store: *breaking :warning:* Changed `--sync-block-duration` default 3m to 15m.