docs(changelog): update PR links

CHANGELOG.md

@@ -4,19 +4,19 @@
 
 ### Added
 
-- Support GCP Endpoints: #259
-- Support DroneCI and Atlantis (Terraform): #255 
-- Support Okta: #254 
-- Support OutScale provider: #251 
-- Support Prometheus Operator: #253 
-- Support Snowflake: #245 
-- Support for CJK fonts + Replace ms-fonts with opensans: #242 
-- Support Pushover: #241 
+- Support GCP Endpoints: [#259](https://github.com/mingrammer/diagrams/pull/259)
+- Support DroneCI and Atlantis (Terraform): [#255](https://github.com/mingrammer/diagrams/pull/255)
+- Support Okta: [#254](https://github.com/mingrammer/diagrams/pull/254)
+- Support OutScale provider: [#251](https://github.com/mingrammer/diagrams/pull/251)
+- Support Prometheus Operator: [#253](https://github.com/mingrammer/diagrams/pull/253)
+- Support Snowflake: [#245](https://github.com/mingrammer/diagrams/pull/245)
+- Support for CJK fonts + Replace ms-fonts with opensans: [#242](https://github.com/mingrammer/diagrams/pull/242)
+- Support Pushover: [#241](https://github.com/mingrammer/diagrams/pull/241)
 
 ### Fixed
 
 - Update bm, vm cases for OCI
-- Set a dummy filename to prevent raise error when both name and filename are not provided: #240 
+- Set a dummy filename to prevent raise error when both name and filename are not provided: [#240](https://github.com/mingrammer/diagrams/pull/240)
 
 ## 0.16.0