Bump boon from 0.6.0 to 0.6.1 in /implementations/rust-boon #879

Job	Run time
list	3s
build (js-hyperjump)	6s
build (ruby-json_schemer)	5s
build (php-opis-json-schema)	8s
build (dotnet-jsonschema-net)	7s
build (go-jsonschema)	6s
build (java-json-schema)	6s
build (go-gojsonschema)	6s
build (java-json-schema-validator)	5s
build (rust-boon)	1m 14s
build (python-jschon)	6s
build (python-fastjsonschema)	20s
build (ts-vscode-json-languageservice)	7s
build (lua-jsonschema)	7s
build (js-ajv)	7s
build (rust-jsonschema)	6s
build (cpp-valijson)	8s
build (clojure-json-schema)	4s
build (java-openapiprocessor)	8s
build (python-jsonschema)	5s
build (java-jsonschemafriend)	5s
build (kotlin-kmp-json-schema-validator)	5s
	3m 34s

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