Update docs due to rules_docker changes. (#279)

repositories/images.bzl

diff --git a/repositories/images.bzl b/repositories/images.bzl
index 0d2ac41..aa56ac5 100644
--- a/repositories/images.bzl
+++ b/repositories/images.bzl
@@ -52,14 +52,18 @@
         bazel_toolchains_repositories()
 
         load(
-            "@io_bazel_rules_docker//container:container.bzl",
-            "container_pull",
+            "@io_bazel_rules_docker//repositories:repositories.bzl",
             container_repositories = "repositories",
         )
 
         container_repositories()
 
         load(
+            "@io_bazel_rules_docker//container:container.bzl",
+            "container_pull",
+        )
+
+        load(
             "//repositories:repositories.bzl",
             bazel_toolchains_images = "images",
         )

rules/docker_config.bzl

diff --git a/rules/docker_config.bzl b/rules/docker_config.bzl
index efd0868..85d272c 100644
--- a/rules/docker_config.bzl
+++ b/rules/docker_config.bzl
@@ -75,13 +75,17 @@
   bazel_toolchains_repositories()
 
   load(
-      "@io_bazel_rules_docker//container:container.bzl",
+      "@io_bazel_rules_docker//repositories:repositories.bzl",
       container_repositories = "repositories",
-      "container_pull",
   )
 
   container_repositories()
 
+  load(
+      "@io_bazel_rules_docker//container:container.bzl",
+      "container_pull",
+  )
+
   # Pulls the my_image used as base for example above
   container_pull(
       name = "my_image",