chore(docs): Add Changelog Katib v0.18.0 #1410

Job	Run time
e2e (v1.29.2, long-running-resume,from-volume-resume,median-stop)	14m 43s
e2e (v1.29.2, grid,bayesian-optimization,tpe,multivariate-tpe,cma-es,hyperband)	19m 41s
e2e (v1.29.2, hyperopt-distribution,optuna-distribution)	12m 54s
e2e (v1.29.2, file-metrics-collector,pytorchjob-mnist)	12m 19s
e2e (v1.29.2, median-stop-with-json-format,file-metrics-collector-with-json-format)	13m 40s
e2e (v1.30.7, long-running-resume,from-volume-resume,median-stop)	14m 15s
e2e (v1.30.7, grid,bayesian-optimization,tpe,multivariate-tpe,cma-es,hyperband)	19m 22s
e2e (v1.30.7, hyperopt-distribution,optuna-distribution)	12m 11s
e2e (v1.30.7, file-metrics-collector,pytorchjob-mnist)	12m 43s
e2e (v1.30.7, median-stop-with-json-format,file-metrics-collector-with-json-format)	12m 57s
e2e (v1.31.3, long-running-resume,from-volume-resume,median-stop)	14m 7s
e2e (v1.31.3, grid,bayesian-optimization,tpe,multivariate-tpe,cma-es,hyperband)	19m 53s
e2e (v1.31.3, hyperopt-distribution,optuna-distribution)	13m 21s
e2e (v1.31.3, file-metrics-collector,pytorchjob-mnist)	14m 4s
e2e (v1.31.3, median-stop-with-json-format,file-metrics-collector-with-json-format)	13m 1s
	3h 39m 11s

Provide feedback