message: update changlog to include all work completed so far for rocm 5.5
diff: Full documentation for rocSPARSE is available at [rocsparse.readthedocs.io](https://rocsparse.readthedocs.io/en/latest/).
  +## (Unreleased) rocSPARSE 2.5.0
  +### Added
  +- Added bsrgeam
  +### Improved
  +- Optimization to csr2bsr
  +- Optimization to csr2csr_compress
  +- Optimization to csr2coo
  +- Optimization to gebsr2csr
  +- Fixes to documentation
  +- Fixes to SpMV and SpMM COO routined to allow larger matrices
  ## rocSPARSE 2.4.0 for ROCm 5.4.0
  ### Added
  