DDBTEAM-826: Added Changelog

CHANGELOG.md

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+<!-- markdownlint-configure-file { "blanks-around-headers": { "lines_below": 0 } } -->
+<!-- markdownlint-configure-file { "blanks-around-lists": false } -->
+
+# Changelog
+
+![keep a changelog badge](https://img.shields.io/badge/Keep%20a%20Changelog-v1.0.0-brightgreen.svg?logo=data%3Aimage%2Fsvg%2Bxml%3Bbase64%2CPHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIGZpbGw9IiNmMTVkMzAiIHZpZXdCb3g9IjAgMCAxODcgMTg1Ij48cGF0aCBkPSJNNjIgN2MtMTUgMy0yOCAxMC0zNyAyMmExMjIgMTIyIDAgMDAtMTggOTEgNzQgNzQgMCAwMDE2IDM4YzYgOSAxNCAxNSAyNCAxOGE4OSA4OSAwIDAwMjQgNCA0NSA0NSAwIDAwNiAwbDMtMSAxMy0xYTE1OCAxNTggMCAwMDU1LTE3IDYzIDYzIDAgMDAzNS01MiAzNCAzNCAwIDAwLTEtNWMtMy0xOC05LTMzLTE5LTQ3LTEyLTE3LTI0LTI4LTM4LTM3QTg1IDg1IDAgMDA2MiA3em0zMCA4YzIwIDQgMzggMTQgNTMgMzEgMTcgMTggMjYgMzcgMjkgNTh2MTJjLTMgMTctMTMgMzAtMjggMzhhMTU1IDE1NSAwIDAxLTUzIDE2bC0xMyAyaC0xYTUxIDUxIDAgMDEtMTItMWwtMTctMmMtMTMtNC0yMy0xMi0yOS0yNy01LTEyLTgtMjQtOC0zOWExMzMgMTMzIDAgMDE4LTUwYzUtMTMgMTEtMjYgMjYtMzMgMTQtNyAyOS05IDQ1LTV6TTQwIDQ1YTk0IDk0IDAgMDAtMTcgNTQgNzUgNzUgMCAwMDYgMzJjOCAxOSAyMiAzMSA0MiAzMiAyMSAyIDQxLTIgNjAtMTRhNjAgNjAgMCAwMDIxLTE5IDUzIDUzIDAgMDA5LTI5YzAtMTYtOC0zMy0yMy01MWE0NyA0NyAwIDAwLTUtNWMtMjMtMjAtNDUtMjYtNjctMTgtMTIgNC0yMCA5LTI2IDE4em0xMDggNzZhNTAgNTAgMCAwMS0yMSAyMmMtMTcgOS0zMiAxMy00OCAxMy0xMSAwLTIxLTMtMzAtOS01LTMtOS05LTEzLTE2YTgxIDgxIDAgMDEtNi0zMiA5NCA5NCAwIDAxOC0zNSA5MCA5MCAwIDAxNi0xMmwxLTJjNS05IDEzLTEzIDIzLTE2IDE2LTUgMzItMyA1MCA5IDEzIDggMjMgMjAgMzAgMzYgNyAxNSA3IDI5IDAgNDJ6bS00My03M2MtMTctOC0zMy02LTQ2IDUtMTAgOC0xNiAyMC0xOSAzN2E1NCA1NCAwIDAwNSAzNGM3IDE1IDIwIDIzIDM3IDIyIDIyLTEgMzgtOSA0OC0yNGE0MSA0MSAwIDAwOC0yNCA0MyA0MyAwIDAwLTEtMTJjLTYtMTgtMTYtMzEtMzItMzh6bS0yMyA5MWgtMWMtNyAwLTE0LTItMjEtN2EyNyAyNyAwIDAxLTEwLTEzIDU3IDU3IDAgMDEtNC0yMCA2MyA2MyAwIDAxNi0yNWM1LTEyIDEyLTE5IDI0LTIxIDktMyAxOC0yIDI3IDIgMTQgNiAyMyAxOCAyNyAzM3MtMiAzMS0xNiA0MGMtMTEgOC0yMSAxMS0zMiAxMXptMS0zNHYxNGgtOFY2OGg4djI4bDEwLTEwaDExbC0xNCAxNSAxNyAxOEg5NnoiLz48L3N2Zz4K)
+
+All notable changes to this project will be documented in this file.
+
+See [keep a changelog](https://keepachangelog.com/en/1.0.0/) for information about writing changes to this log.
+
+## [Unreleased]
+
+## [3.0.0] - 2022-07-05
+
+### Changed
+- Upgrade to Symfony 6. Migrated to new Symfony authentication system.
+- Upgrade tp PHP 8