chore(changelog): adding changelogs from 2.4.0 to 2.6.0

Signed-off-by: shubham <[email protected]>

CHANGELOG.md

@@ -1,3 +1,39 @@
+v2.6.0 / 2021-02-13
+========================
+
+
+v2.6.0-RC2 / 2021-02-11
+========================
+
+
+v2.6.0-RC1 / 2021-02-08
+========================
+
+
+v2.5.0 / 2021-01-13
+========================
+
+
+v2.5.0-RC2 / 2021-01-11
+========================
+
+
+v2.5.0-RC1 / 2021-01-08
+========================
+
+
+v2.4.0 / 2020-12-13
+========================
+
+
+v2.4.0-RC2 / 2020-12-12
+========================
+
+
+v2.4.0-RC1 / 2020-12-10
+========================
+
+
 v2.3.0 / 2020-11-14
 ========================
 * chore(build): add support for multiarch build  ([#71](https://github.com/openebs/libcstor/pull/71),[@shubham14bajpai](https://github.com/shubham14bajpai))