update beats: fix new file location (#6700) (#7214)

(cherry picked from commit ea46964)

Co-authored-by: Victor Martinez <[email protected]>

.ci/scripts/update-beats.sh

@@ -11,7 +11,7 @@ COMMIT_MESSAGE="Update to elastic/beats@$(go list -m -f {{.Version}} github.com/
 git checkout -b "update-beats-$(date "+%Y%m%d%H%M%S")"
 git add --ignore-errors go.mod go.sum NOTICE.txt \
 	.go-version docs/version.asciidoc \
-	docs/fields.asciidoc include/fields.go x-pack/apm-server/include/fields.go
+	include/fields.go x-pack/apm-server/include/fields.go
 
 find . -maxdepth 2 -name Dockerfile -exec git add {} \;