Update CHANGELOG.md

Author: ufechner7

CHANGELOG.md

@@ -1,3 +1,13 @@
+### Unreleased
+#### Fixed
+- the `run_julia` now modifies the LD_LIBRARY_PATH to avoid problems with shared libraries on Linux
+- out-of memory error when running `create_sys_image` on systems with 16GB RAM
+- error on Windows when using the `Tether_6c.jl` example
+#### Changed
+- renamed ODESystem to System
+- updated the `install` script to also compile the docs project
+- update the `create_sys_image` script
+
 ### Tethers v1.2.2 2026-03-20
 #### Added
 - add CITATION.cff