update to use handlebars v5 #883

Job	Run time
docs	2m 2s
clippy	2m 28s
runefmt	1m 46s
rustfmt	6s
basics	1s
msrv	2m 38s
miri_rune_alloc	4m 38s
build_feature (capture-io)	1m 1s
miri_rune	5m 44s
build_feature (cli,doc)	1m 28s
no_std_minimal	3m 42s
no_default_features	56s
wasm	1m 5s
build_feature (cli,fmt)	1m 30s
build_feature (cli)	1m 29s
build_feature (workspace)	56s
build_feature (languageserver)	1m 20s
build_feature (byte-code)	55s
test	12m 14s
	45m 59s

Provide feedback