update changelog

CHANGELOG.md

@@ -11,7 +11,7 @@ Features
 Bugfixes
 --------
 
-- Fix warnings about finish() after disconnect. ([\#84](https://github.com/matrix-org/sygnal/issues/84))
+- Fix warnings about `finish()` after disconnect. ([\#84](https://github.com/matrix-org/sygnal/issues/84))
 - Fix a bug which meant that requests were logged with an invalid timestamp. ([\#86](https://github.com/matrix-org/sygnal/issues/86))
 
 
@@ -21,12 +21,14 @@ Internal Changes
 - Change how we stub out HTTP requests in the tests. ([\#85](https://github.com/matrix-org/sygnal/issues/85))
 
 
-### Sygnal 0.2.4 (2019-08-29)
+Sygnal 0.2.4 (2019-08-29)
+===
 
 - Fix typo leading to poor handling of 5xx GCM response codes.
 - Handle 404 GCM response codes.
 
-### Sygnal 0.2.3 (2019-08-14)
+Sygnal 0.2.3 (2019-08-14)
+===
 
 - Actually fix GCM connection limiting, and exception handling of exceptions
   that occur whilst reading the response body.
@@ -35,19 +37,22 @@ Internal Changes
 - Add a Prometheus metric that tracks the time taken to handle a `/notify` request.
 - Add a `/health` endpoint for checking whether Sygnal is up.
 
-### Sygnal 0.2.2 (2019-08-12)
+Sygnal 0.2.2 (2019-08-12)
+===
 
 - Fix GCM connection limiting.
 - Clean up exception handling code.
 
-### Sygnal 0.2.1 (2019-08-08)
+Sygnal 0.2.1 (2019-08-08)
+===
 
 - Declare sentry-sdk as a dependency.
 - Obey GCM maximum connections count.
 - Document `max_connections` config option in GCM.
 - Separate Twisted's logging and the access logging.
 
-### Sygnal 0.2.0 (2019-08-02)
+Sygnal 0.2.0 (2019-08-02)
+===
 
 This is a rewrite of Sygnal 0.0.1.
 Before upgrading, please note that **Python 3.7 or higher is required**.