feat: replace the icons

templates/repo/header.tmpl

@@ -99,7 +99,7 @@
 
 				{{if .Permission.CanRead $.UnitTypeDatasets}}
 				<a class="{{if .PageIsDataset}}active{{end}} item" href="{{.RepoLink}}/datasets">
-					{{svg "octicon-file-submodule" 16}} {{.i18n.Tr "datasets"}}
+					{{svg "octicon-inbox" 16}} {{.i18n.Tr "datasets"}}
 				</a>
 				{{end}}
 
@@ -141,7 +141,7 @@
 
 				{{if .Permission.CanRead $.UnitTypeCloudBrain}}
 				<a class="{{if .PageIsCloudBrain}}active{{end}} item" href="{{.RepoLink}}/cloudbrain">
-					{{svg "octicon-file-submodule" 16}} {{.i18n.Tr "repo.cloudbrain"}}
+					{{svg "octicon-server" 16}} {{.i18n.Tr "repo.cloudbrain"}}
 				</a>
 				{{end}}