feat: add 'adminforth-user-soft-delete' plugin to installation script

Author: yaroslav8765

plugins/install-plugins.sh

@@ -3,7 +3,7 @@ PLUGINS="adminforth-audit-log adminforth-email-password-reset adminforth-foreign
 adminforth-i18n adminforth-import-export adminforth-text-complete adminforth-open-signup \
 adminforth-rich-editor adminforth-two-factors-auth adminforth-upload adminforth-oauth \
 adminforth-list-in-place-edit adminforth-inline-create adminforth-markdown adminforth-email-invite adminforth-bulk-ai-flow \
-adminforth-universal-search adminforth-login-captcha"
+adminforth-universal-search adminforth-login-captcha adminforth-user-soft-delete"
 
 # Function to install a plugin
 install_plugin() {