[backend] Update dependency org.springdoc:springdoc-openapi-starter-webmvc-ui to v2.8.6

Author: renovate[bot]

openbas-api/pom.xml

@@ -18,7 +18,7 @@
         <commons-collections4.version>4.4</commons-collections4.version>
         <commons-email.version>1.5</commons-email.version>
         <opensaml.version>4.3.2</opensaml.version>
-        <springdoc.version>2.6.0</springdoc.version>
+        <springdoc.version>2.8.6</springdoc.version>
         <springdoc-plugin.version>1.4</springdoc-plugin.version>
         <cron-utils.version>9.2.1</cron-utils.version>
         <apache-poi.version>5.4.0</apache-poi.version>