Update changelog

Author: mesnardo

CHANGELOG.md

@@ -2,7 +2,7 @@
 
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-## 0.4.1
+## 0.4.2
 
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@@ -16,6 +16,22 @@
 
 ### Fixed
 
+* Probes: fix index for pressure field when using a volume probe (see PR [#145](https://github.com/barbagroup/PetIBM/pull/145)).
+
+### Removed
+
+---
+
+## 0.4.1
+
+---
+
+### Added
+
+### Changed
+
+### Fixed
+
 * Probes: monitor the correct sub-domain using indices with PETSc ordering, not natural ordering (see PR [#144](https://github.com/barbagroup/PetIBM/pull/144)).
 
 ### Removed