docs: added example for bootstrap vue closes #3979

Author: logaretm

docs/src/pages/examples/ui-libraries.mdx

@@ -73,6 +73,12 @@ This example is originally forked from another example created by [Aaron Saunder
 
 <LiveExample client:visible id="vee-validate-v4-naive-ui" click-to-load preview-only />
 
+## Bootstrap Vue
+
+> With [BootstrapVue](https://bootstrap-vue.org/) you can build responsive, mobile-first, and ARIA accessible projects on the web using Vue.js and the world's most popular front-end CSS library
+
+<LiveExample client:visible id="vee-validate-v4-bootstrap-vue" click-to-load preview-only />
+
 ## Request a UI library
 
 Can't find your favorite UI library here? You can request adding an example for it by creating an [issue here](https://github.com/logaretm/vee-validate/issues/new/choose) and we will consider adding it here.