go-helloworld: update to latest revision

go-helloworld: update to latest revision

Shortlog:
- go.mod: update golang.org/x dependencies
- weave: fix %include parsing, add highlighting
- example/slog-handler-guide: run `make`
- example/weave: update TOC anchors to remove **, _, and `
- slog-handler-guide: remove doubled word
- slog-handler-guide: warn against embedding
- slog-handler-guide: fix typo, tweak phrasing

Signed-off-by: Gyorgy Sarvari <skandigraun@gmail.com>
Signed-off-by: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>