[BUG] Server-Side Encryption with Client-Managed Keys example uses deprecated flag

[LenzGr]

Describe the bug
The documentation Server-Side Encryption with Client-Managed Keys (SSE-C) provides CLI examples that use the --encrypt-key flag, which seems to be deprecated.

Running the command with this option returns an error:

mc: <ERROR> a deprecated Flag: '--encrypt-key' has been deprecated, please use --enc-c instead.

To Reproduce
Steps to reproduce the behavior:

1. Try running the examples in this chapter
2. Observe the error message

Expected behavior
The examples should be updated to use the new --enc-c flag instead.

Desktop (please complete the following information):

• OS: macOS 14.5
• Version: mc installed via HomeBrew

mc version RELEASE.2024-06-29T19-08-46Z (commit-id=f5b325d9d399e09b4d21384081e397a52f6ca89d)
Runtime: go1.22.4 darwin/arm64
Copyright (c) 2015-0000 MinIO, Inc.
License GNU AGPLv3 <https://www.gnu.org/licenses/agpl-3.0.html>

[feorlen]

Hi @LenzGr thanks for the docs bug! 🐛

We have an open issue for this as part of related docs changes for #1191. You may wish to follow that issue for updates.