docs/api: update redirect metadata for hugo

docs.docker.com switched from Jekyll to Hugo, which uses "aliases"
instead of "redirect_from".

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

docs/api/v1.18.md

@@ -2,7 +2,7 @@
 title: "Engine API v1.18"
 description: "API Documentation for Docker"
 keywords: "API, Docker, rcli, REST, documentation"
-redirect_from:
+aliases:
 - /engine/reference/api/docker_remote_api_v1.18/
 - /reference/api/docker_remote_api_v1.18/
 ---

docs/api/v1.19.md

@@ -2,7 +2,7 @@
 title: "Engine API v1.19"
 description: "API Documentation for Docker"
 keywords: "API, Docker, rcli, REST, documentation"
-redirect_from:
+aliases:
 - /engine/reference/api/docker_remote_api_v1.19/
 - /reference/api/docker_remote_api_v1.19/
 ---

docs/api/v1.20.md

@@ -2,7 +2,7 @@
 title: "Engine API v1.20"
 description: "API Documentation for Docker"
 keywords: "API, Docker, rcli, REST, documentation"
-redirect_from:
+aliases:
 - /engine/reference/api/docker_remote_api_v1.20/
 - /reference/api/docker_remote_api_v1.20/
 ---

docs/api/v1.21.md

@@ -2,7 +2,7 @@
 title: "Engine API v1.21"
 description: "API Documentation for Docker"
 keywords: "API, Docker, rcli, REST, documentation"
-redirect_from:
+aliases:
 - /engine/reference/api/docker_remote_api_v1.21/
 - /reference/api/docker_remote_api_v1.21/
 ---

docs/api/v1.22.md

@@ -2,7 +2,7 @@
 title: "Engine API v1.22"
 description: "API Documentation for Docker"
 keywords: "API, Docker, rcli, REST, documentation"
-redirect_from:
+aliases:
 - /engine/reference/api/docker_remote_api_v1.22/
 - /reference/api/docker_remote_api_v1.22/
 ---

docs/api/v1.23.md

@@ -2,7 +2,7 @@
 title: "Engine API v1.23"
 description: "API Documentation for Docker"
 keywords: "API, Docker, rcli, REST, documentation"
-redirect_from:
+aliases:
 - /engine/reference/api/docker_remote_api_v1.23/
 - /reference/api/docker_remote_api_v1.23/
 ---

docs/api/v1.24.md

@@ -2,7 +2,7 @@
 title: "Engine API v1.24"
 description: "API Documentation for Docker"
 keywords: "API, Docker, rcli, REST, documentation"
-redirect_from:
+aliases:
 - /engine/reference/api/docker_remote_api_v1.24/
 - /reference/api/docker_remote_api_v1.24/
 ---