Update CHANGELOG.md (#3144)

Example S3 SSE migration block seems to had been misplaced in another section.

Signed-off-by: 0x63lv <[email protected]>

CHANGELOG.md

@@ -45,11 +45,6 @@ Thanos Rule's `/api/v1/rules` endpoint no longer returns the old, deprecated `pa
 - [#3105](https://github.com/thanos-io/thanos/pull/3105) Querier: Fix overwriting `maxSourceResolution` when auto downsampling is enabled.
 - [#3010](https://github.com/thanos-io/thanos/pull/3010) Querier: Added `--query.lookback-delta` flag to override the default lookback delta in PromQL. The flag should be lookback delta should be set to at least 2 times of the slowest scrape interval. If unset it will use the PromQL default of 5m.
 
-```yaml
-sse_config:
-  type: SSE-S3
-```
-
 ### Added
 
 - [#2305](https://github.com/thanos-io/thanos/pull/2305) Receive,Sidecar,Ruler: Propagate correct (stricter) MinTime for TSDBs that have no block.
@@ -73,6 +68,10 @@ sse_config:
 - [#2991](https://github.com/thanos-io/thanos/pull/2991) Store: *breaking :warning:* `operation` label value `getrange` changed to `get_range` for `thanos_store_bucket_cache_operation_requests_total` and `thanos_store_bucket_cache_operation_hits_total` to be consistent with bucket operation metrics.
 - [#2876](https://github.com/thanos-io/thanos/pull/2876) Receive,Ruler: Updated TSDB and switched to ChunkIterators instead of sample one, which avoids unnecessary decoding / encoding.
 - [#3064](https://github.com/thanos-io/thanos/pull/3064) s3: *breaking :warning:* Add SSE/SSE-KMS/SSE-C configuration. The S3 `encrypt_sse: true` option is now deprecated in favour of `sse_config`. If you used `encrypt_sse`, the migration strategy is to set up the following block:
+```yaml
+sse_config:
+  type: SSE-S3
+```
 
 ## [v0.14.0](https://github.com/thanos-io/thanos/releases/tag/v0.14.0) - 2020.07.10