Corrected markdown documentation for --stars

The `--stars` option was incorrectly documented as meaning
the number of stars to filter by. This has been corrected
to indicate that it is the minimum number of stars to filter
by.

Tweaked wording of podman-search.md stars filter text

Signed-off-by: Kaniel Kirby <[email protected]>

Author: Piratey7007

docs/source/markdown/podman-search.1.md.in

@@ -47,7 +47,7 @@ Filter output based on conditions provided (default [])
 
 Supported filters are:
 
-* stars (int - number of stars the image has)
+* stars (int) - minimum number of stars required for images to show
 * is-automated (boolean - true | false) - is the image automated or not
 * is-official (boolean - true | false) - is the image official or not