Merge pull request #56541 from apoorvajagtap/OCPBUGS-8027

OCPBUGS#8027: Remove prefixes (http[s]) from `.docker/config.json` examples

Author: mburke5678

modules/builds-docker-credentials-private-registries.adoc

@@ -21,13 +21,13 @@ has the following format:
 [source,yaml]
 ----
 auths:
-  https://index.docker.io/v1/: <1>
+  index.docker.io/v1/: <1>
     auth: "YWRfbGzhcGU6R2labnRib21ifTE=" <2>
     email: "[email protected]" <3>
-  https://docker.io/my-namespace/my-user/my-image: <4>
+  docker.io/my-namespace/my-user/my-image: <4>
     auth: "GzhYWRGU6R2fbclabnRgbkSp=""
     email: "[email protected]"
-  https://docker.io/my-namespace: <5>
+  docker.io/my-namespace: <5>
     auth: "GzhYWRGU6R2deesfrRgbkSp=""
     email: "[email protected]"
 ----