Minor typo fix (#10043)

Author: AHinMaine

routers/api/v1/admin/repo.go

@@ -15,7 +15,7 @@ import (
 func CreateRepo(ctx *context.APIContext, form api.CreateRepoOption) {
 	// swagger:operation POST /admin/users/{username}/repos admin adminCreateRepo
 	// ---
-	// summary: Create a repository on behalf a user
+	// summary: Create a repository on behalf of a user
 	// consumes:
 	// - application/json
 	// produces:

templates/swagger/v1_json.tmpl

@@ -335,7 +335,7 @@
         "tags": [
           "admin"
         ],
-        "summary": "Create a repository on behalf a user",
+        "summary": "Create a repository on behalf of a user",
         "operationId": "adminCreateRepo",
         "parameters": [
           {