Add hugo version check and theme update to Makefile (#2608)#2636

ADubhlaoich merged 2 commits intonginx:release-1.4nginx/nginx-gateway-fabric:release-1.4from

nginx-jack:cherry-pick-release-1.4-605085ac862e1361d2ba438c4ff449f95c5430b3nginx-jack/nginx-gateway-fabric:cherry-pick-release-1.4-605085ac862e1361d2ba438c4ff449f95c5430b3Copy head branch name to clipboard