Boost_Term Cause Solr Error: possible analysis error: For input string: "5,0"

Setup

• Solr version: 8.8.2
• Drupal Core version: 9.1.9
• Search API version: 8.x-1.19
• Search API Solr version: 4.1.11

Issue

search_api_solr/src/Plugin/search_api/backend/SearchApiSolrBackend.php
Line: 2452

Code: sprintf('%.1f', $boost)

the problem is the sprintf with parameter "f" - "the argument is treated as a float and presented as a floating-point number (locale aware). "

On German Websites (locale=de_De) this leads to a boost_term "String|1,0" and this throw´s a error on the solr server
-> possible analysis error: For input string: "5,​0"

You have to use the paramter '%.1F' instead