Add note about MSRV update in 0.13.3

Signed-off-by: Matthias Beyer <[email protected]>
(cherry picked from commit dabf0c4)
Signed-off-by: Matthias Beyer <[email protected]>

Author: matthiasbeyer

CHANGELOG.md

@@ -8,6 +8,10 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 ## 0.13.3 - 2022-12-04
 
+Please note that we had to update the MSRV for this crate from 1.56.0 to 1.59.0
+for this patch release being possible, because a transitive dependency did
+update its MSRV.
+
  - Backport of commit [d54986c54091e4620c199d3dfadde80b82958bb3] from [#362] for
    using float_cmp for testing floats
  - Backport of [#379] adding `Clone` trait derive to builder states