Replaces ADD with COPY in the COPY section

Possibly a typo from reusing text from the ADD section.

Signed-off-by: Hugo Gabriel Eyherabide <hugogabriel.eyherabide@gmail.com>
(cherry picked from commit 86cbe28510ad7cc91694fec520ad8c33f7cd844f)
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
Upstream-commit: 5c5486d910a6f2a5e013970d715cd77b92ad821c
Component: cli

Author: eyherabh

components/cli/docs/reference/builder.md

@@ -1276,11 +1276,11 @@ COPY test.txt /absoluteDir/
 
 When copying files or directories that contain special characters (such as `[`
 and `]`), you need to escape those paths following the Golang rules to prevent
-them from being treated as a matching pattern. For example, to add a file
+them from being treated as a matching pattern. For example, to copy a file
 named `arr[0].txt`, use the following;
 
 ```dockerfile
-ADD arr[[]0].txt /mydir/
+COPY arr[[]0].txt /mydir/
 ```
 
 All new files and directories are created with a UID and GID of 0, unless the