Update CHANGELOG.md with missing releases and add PR template (#279)

* update changelog with missing releases and add PR template

* update changelog for next release

---------

Co-authored-by: Ramon <ramon.guimera@skyscanner.net>

.github/pull_request_template.md

@@ -0,0 +1,7 @@
+# Description
+
+<!-- Please include a summary of the change, how this updates the current logic and which features are added or removed. Please also include relevant motivation and context. List any dependencies that are required for this change. -->
+
+## Checklist
+
+- [ ] I have updated the CHANGELOG.md file accordingly

CHANGELOG.md

@@ -9,27 +9,32 @@ All notable changes to this project will be documented in this file.
 ## [1.15.7]
 ### Updates
 - Bumped pycfmodel to use pydantic v2
+### Other updates
+- Add PR template @w0rmr1d3r (#279)
 
 ## [1.15.6]
-## Fixes
-- Fix logo displayed in pypi
+### Fixes
+- Fix logo in pypi @ignaciobolonio (#274)
 ### Updates
-- Bumped python used in readthedocs to 3.9
+- Update .readthedocs.yaml @jsoucheiron (#275)
+### Bumps
+- Bump actions/setup-python from 4 to 5 (#270)
+- Bump cryptography from 42.0.3 to 42.0.4 (#272)
 
 ## [1.15.5]
 ### Changes
-- Add dependabot config
-- Migrate to `pyproject.toml`
+- Migrate to pyproject.toml @jsoucheiron (#269)
+- Add dependabot config @w0rmr1d3r (#257)
 
 ## [1.15.4]
-## Fixes
+### Fixes
 - Fix `KMSKeyWildcardPrincipalRule` to work without a KMS policy
 - Fix release drafter template to show PR titles
 ### Updates
 - Bumped minimum `pycfmodel` version to `0.22.0`
 
 ## [1.15.3]
-## Changes
+### Changes
 - Update invalid_role_inline_policy_fn_if.json 
 - Improve logging for the exception when applying rule filters
 - Add release drafter