Bump legacy CLI to 4.28.0

Release notes (https://github.com/platformsh/legacy-cli/releases/tag/v4.28.0 ):

New features:

* Display activities with non-zero exit codes as failed.
* Allow specifying the deploy strategy on push.
* Switch to new, more efficient endpoint for querying metrics.
  Output will be mostly the same as the previous `metrics` commands, with these
  exceptions:
  - Rows for the `router` service are now displayed by default.
  - The `---internal---storage` is no longer displayed by default.
  - `inodes` columns are now displayed by default in the `metrics` command. The
    first 5 table columns are the same, and the other commands' default columns
    are the same.
  - The `--interval` option is deprecated and no longer has an effect. The
    default interval displayed changes from 2 minutes to 1 minute.

Other changes:

* Error earlier in non-interactive mode when an organization ID is required.
* Add an example for adding a column in activity:list command help.
* Remove security contact from writable properties of billing profile.

Author: pjcdawkins

Makefile

@@ -1,5 +1,5 @@
 PHP_VERSION = 8.2.29
-LEGACY_CLI_VERSION = 4.27.0
+LEGACY_CLI_VERSION = 4.28.0
 
 GORELEASER_ID ?= upsun