Update pctools paper

Author: jorgensd

references.bib

@@ -144,11 +144,12 @@ @article{Nitsche1971
 
 
 @misc{rehor2025pctools,
-  title         = {{FEniCSx-pctools: Tools for PETSc block linear algebra preconditioning in FEniCSx}},
-  author        = {Martin Řehoř and Jack S. Hale},
-  year          = {2025},
-  eprint        = {2402.02523},
-  archiveprefix = {arXiv},
-  primaryclass  = {cs.MS},
-  doi           = {10.48550/arXiv.2402.02523}
-}
+  author  = {Řehoř, Martin and Hale, Jack S.},
+  doi     = {10.5334/jors.494},
+  journal = {Journal of Open Research Software},
+  keyword = {en},
+  month   = {Sep},
+  title   = {FEniCSx-pctools: Tools for PETSc Block Linear Algebra Preconditioning in FEniCSx},
+  year    = {2025},
+  doi     = {10.5334/jors.494}
+}