docs: use HTML img tag for full-width centered banner

Author: MaartenMarsman

README.md

@@ -1,7 +1,10 @@
 
 <!-- README.md is generated from Readme.Rmd. Please edit that file -->
 
-![bgms](man/figures/bgms-banner.svg)
+<p align="center">
+
+<img src="man/figures/bgms-banner.svg" width="100%" alt="bgms">
+</p>
 
 <!-- badges: start -->
 
@@ -78,7 +81,7 @@ Related methodological papers:
 4.  Sekulovski, N., Arena, G., Haslbeck, J. M. B., Huth, K. B. S.,
     Friel, N., & Marsman, M. (2025). A stochastic block prior for
     clustering in graphical models.
-    [![PsyArXiv:29p3m](https://img.shields.io/badge/PsyArXiv-29p3m-blue.svg)](https://osf.io/preprints/psyarxiv/29p3m_v1)
+    [![PsyArXiv:29p3m](https://img.shields.io/badge/PsyArXiv-29p3m-blue.svg)](https://osf.io/preprints/psyarxiv/29p3m_v3)
 
 You can also retrieve the citation from R:
 

Readme.Rmd

@@ -14,7 +14,9 @@ knitr::opts_chunk$set(
 )
 ```
 
-![bgms](man/figures/bgms-banner.svg)
+<p align="center">
+  <img src="man/figures/bgms-banner.svg" width="100%" alt="bgms">
+</p>
 
 <!-- badges: start -->
 [![CRAN Version](https://www.r-pkg.org/badges/version/bgms)](https://cran.r-project.org/package=bgms)
@@ -88,7 +90,7 @@ Related methodological papers:
 4. Sekulovski, N., Arena, G., Haslbeck, J. M. B., Huth, K. B. S.,
    Friel, N., & Marsman, M. (2025). A stochastic block prior for
    clustering in graphical models.
-   [![PsyArXiv:29p3m](https://img.shields.io/badge/PsyArXiv-29p3m-blue.svg)](https://osf.io/preprints/psyarxiv/29p3m_v1)
+   [![PsyArXiv:29p3m](https://img.shields.io/badge/PsyArXiv-29p3m-blue.svg)](https://osf.io/preprints/psyarxiv/29p3m_v3)
 
 You can also retrieve the citation from R: