docs: address issue #24323 (#24328)

## Summary
Removed time-relative language "currently" from Alpine image size
description.

## Changes
- Removed "currently" from the Alpine image description in the FROM
section of best-practices.md

Fixes #24323

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Co-authored-by: dvdksn <35727626+dvdksn@users.noreply.github.com>

Author: dvdksn

content/manuals/build/building/best-practices.md

@@ -287,7 +287,7 @@ to create an efficient and maintainable Dockerfile.
 
 Whenever possible, use current official images as the basis for your
 images. Docker recommends the [Alpine image](https://hub.docker.com/_/alpine/) as it
-is tightly controlled and small in size (currently under 6 MB), while still
+is tightly controlled and small in size (under 6 MB), while still
 being a full Linux distribution.
 
 For more information about the `FROM` instruction, see [Dockerfile reference for the FROM instruction](/reference/dockerfile.md#from).