Update NOTICE.txt

Author: dependabot[bot]

NOTICE.txt

@@ -1166,11 +1166,11 @@ SOFTWARE
 
 --------------------------------------------------------------------------------
 Dependency : github.com/elastic/elastic-agent-libs
-Version: v0.8.0
+Version: v0.9.1
 Licence type (autodetected): Apache-2.0
 --------------------------------------------------------------------------------
 
-Contents of probable licence file $GOMODCACHE/github.com/elastic/elastic-agent-libs@v0.8.0/LICENSE:
+Contents of probable licence file $GOMODCACHE/github.com/elastic/elastic-agent-libs@v0.9.1/LICENSE:
 
                                  Apache License
                            Version 2.0, January 2004