Publish https://arrow.apache.org/swift/

[raulcd]

.asf.yaml already has related configuration:

arrow-swift/.asf.yaml

Lines 44 to 46 in a546fd8

	publish:
	whoami: asf-site
	subdir: swift

We just need to push to the asf-site branch.

FYI: apache/arrow-go just redirects https://arrow.apache.org/go/ to https://pkg.go.dev/github.com/apache/arrow-go/ .

See also: https://github.com/apache/arrow-go/blob/asf-site/.htaccess

[hiroyuki-sato]

JFYI: This PR updates Swift link on the Official site.
apache/arrow-site#660

[ianmcook]

Please also update the two Swift docs links in docs/source/implementations.rst. Change https://github.com/apache/arrow-swift/blob/main/Arrow/README.md to whatever the correct docs link is after this change.