documentation: add changelog generator default params

.github_changelog_generator

@@ -0,0 +1,20 @@
+# Command to generate: github_changelog_generator --since-tag <last release> --future-release <new release> -t <github token>
+
+# Running the command updates the file with info from rero/ng-core:staging
+base=CHANGELOG.md
+user=rero
+project=ng-core
+release-branch=staging
+
+# Limit issues fetched so as to not reach secondary API limit
+max-issues=800
+# Exclude labels from changelog
+exclude-labels=stale,duplicate,wontfix,translations
+
+bug-labels=bug,Bug,bug (critical),correction
+
+breaking-labels=dev: dependencies
+breaking-label=Dependencies upgrades:
+
+# Export following labels to the changelog to help with categorizing the release-notes
+issue-line-labels=f: activity-logs,f: data export,f: data migration,f: data,f: editor,f: mef,f: professional ui,f: public ui, UX

CHANGELOG.md

@@ -40,18 +40,13 @@
 
 **Merged pull requests:**
 
-- release: version 1.14.2 [\#463](https://github.com/rero/ng-core/pull/463) ([jma](https://github.com/jma))
 - translations: translate v1.14.2 [\#457](https://github.com/rero/ng-core/pull/457) ([iGormilhit](https://github.com/iGormilhit))
 - validator: escape double quotes in value [\#455](https://github.com/rero/ng-core/pull/455) ([Garfield-fr](https://github.com/Garfield-fr))
 
 ## [v1.14.1](https://github.com/rero/ng-core/tree/v1.14.1) (2021-10-13)
 
 [Full Changelog](https://github.com/rero/ng-core/compare/v1.14.0...v1.14.1)
 
-**Merged pull requests:**
-
-- release: version 1.14.1 [\#454](https://github.com/rero/ng-core/pull/454) ([jma](https://github.com/jma))
-
 ## [v1.14.0](https://github.com/rero/ng-core/tree/v1.14.0) (2021-10-12)
 
 [Full Changelog](https://github.com/rero/ng-core/compare/v1.13.5...v1.14.0)
@@ -97,7 +92,6 @@
 
 **Merged pull requests:**
 
-- release: version 1.13.1 [\#440](https://github.com/rero/ng-core/pull/440) ([jma](https://github.com/jma))
 - dependencies: fix security issues [\#439](https://github.com/rero/ng-core/pull/439) ([jma](https://github.com/jma))
 - translations: translate v0.13.1 [\#438](https://github.com/rero/ng-core/pull/438) ([jma](https://github.com/jma))
 - search input: add the disabled attribute [\#437](https://github.com/rero/ng-core/pull/437) ([Garfield-fr](https://github.com/Garfield-fr))
@@ -125,7 +119,6 @@
 
 **Merged pull requests:**
 
-- release: version 1.12.2 [\#426](https://github.com/rero/ng-core/pull/426) ([jma](https://github.com/jma))
 - records: fix aggregation name [\#425](https://github.com/rero/ng-core/pull/425) ([sebastiendeleze](https://github.com/sebastiendeleze))
 
 ## [v1.12.1](https://github.com/rero/ng-core/tree/v1.12.1) (2021-07-20)