Update changelog for coderev install5
## C library
- Deprecated the `native` non-Limber angular power spectrum method (#506).
+- Renamed `ccl\_lsst\_specs.c` to `ccl\_redshifts.c`, deprecated LSST-specific redshift distribution functionality, introduced user-defined true dNdz (changes in call signature of `ccl\_dNdz\_tomog`). (#528).
## Python library
+- Renamed `lsst\_specs.py` to `redshifts.py`, deprecated LSST-specific redshift distribution functionality, introduced user-defined true dNdz (changes in call signature of `dNdz\_tomog`). (#528).
- Deprecated the `native` non-Limber angular power spectrum method (#506).
- Deprecated the `Parameters` object in favor of only the `Cosmology` object (#493).
- Renamed the `ClTracer` family of objects (#496).
