Clean up change log (#696)

* Clean up change log

* Missed a preposition

CHANGELOG.rst

@@ -10,21 +10,21 @@ Changelog
 2.6.0 - 2023-09-05
 ------------------
 
-**New features**
+**New features:**
 
-- Added the complementary log-log (`cloglog`) link function.
+- Added the complementary log-log (``cloglog``) link function.
 - Added the option to store the covariance matrix after estimating it. In this case, the covariance matrix does not have to be recomputed when calling inference methods.
 - Added methods for performing Wald tests based on a restriction matrix, feature names or term names.
 - Added a method for creating a coefficient table with confidence intervals and p-values.
 
-**Bug fix**
+**Bug fix:**
 
 - Fixed :meth:`~glum.GeneralizedLinearRegressorBase.covariance_matrix` mutating feature names when called with a data frame. See `here <https://github.com/Quantco/glum/issues/669>`_.
 
 **Other changes:**
 
-- When computing the covariance matrix, check for ill-conditionedness for all types of input. Furthermore, do it in a more efficient way.
-- Pin `tabmat<4.0.0` (the new release will bring breaking changes).
+- When computing the covariance matrix, check whether the design matrix is ill-conditioned for all types of input. Furthermore, do it in a more efficient way.
+- Pin ``tabmat<4.0.0`` (the new release will bring breaking changes).
 
 
 2.5.2 - 2023-06-02
@@ -44,15 +44,15 @@ Changelog
 2.5.1 - 2023-05-19
 ------------------
 
-**Bug fix**
+**Bug fix:**
 
 - We fixed a bug in the computation of :meth:`~glum.distribution.NegativeBinomialDistribution.log_likelihood`. Previously, this method just returned ``None``.
 
 
 2.5.0 - 2023-04-28
 ------------------
 
-**New feature**
+**New feature:**
 
 - Added Negative Binomial distribution by setting the ``'family'`` parameter of
   :class:`~glum.GeneralizedLinearRegressor` and :class:`~glum.GeneralizedLinearRegressorCV`