chore(deps): update kibana-openapi-spec digest to 7b68136

Author: elastic-renovate-prod[bot]

generated/kbapi/Makefile

@@ -2,7 +2,7 @@
 SHELL := /bin/bash
 ROOT_DIR := $(shell dirname $(realpath $(firstword $(MAKEFILE_LIST))))
 
-github_ref ?= 718e7a275b773c28cbd697182532d47742a4017a
+github_ref ?= 7b68136a62fd4625d1b3baa9bfe09fde359a6895
 oas_url    := https://raw.githubusercontent.com/elastic/kibana/$(github_ref)/oas_docs/output/kibana.yaml
 
 .PHONY: all