Added IMAJNA citation info to readme

Author: lindonroberts

README.rst

@@ -38,7 +38,7 @@ The development of DFO-LS is outlined over several publications:
 
 1. C Cartis, J Fiala, B Marteau and L Roberts, `Improving the Flexibility and Robustness of Model-Based Derivative-Free Optimization Solvers <https://doi.org/10.1145/3338517>`_, *ACM Transactions on Mathematical Software*, 45:3 (2019), pp. 32:1-32:41 [`preprint arXiv 1804.00154 <https://arxiv.org/abs/1804.00154>`_] . 
 2. M Hough and L Roberts, `Model-Based Derivative-Free Methods for Convex-Constrained Optimization <https://doi.org/10.1137/21M1460971>`_, *SIAM Journal on Optimization*, 21:4 (2022), pp. 2552-2579 [`preprint arXiv 2111.05443 <https://arxiv.org/abs/2111.05443>`_].
-3. Y Liu, K H Lam and L Roberts, `Black-box Optimization Algorithms for Regularized Least-squares Problems <http://arxiv.org/abs/2407.14915>`_, *arXiv preprint arXiv:arXiv:2407.14915*, 2024.
+3. Y Liu, K H Lam and L Roberts, `Regularized black-box optimization algorithms for least-squares problems <https://doi.org/10.1093/imanum/draf093>`_, *IMA Journal of Numerical Analysis*, 2025 [`preprint arXiv 2407.14915 <https://arxiv.org/abs/2407.14915>`_].
 
 If you use DFO-LS in a paper, please cite [1]. 
 If your problem has constraints, including bound constraints, please cite [1,2].