Fix colon spacing on "Constructor References" example
Fix colon spacing on "Constructor References" example

So it corresponds to the rest of this file and https://kotlinlang.org/docs/reference/coding-conventions.html#colon

hltj/kotlin-web-site-cn,TeamKotl/kotlin-web-site,JetBrains/kotlin-web-site,TeamKotl/kotlin-web-site,JetBrains/kotlin-web-site,hltj/kotlin-web-site-cn,belovrv/kotlin-web-site,hltj/kotlin-web-site-cn,belovrv/kotlin-web-site,TeamKotl/kotlin-web-site,JetBrains/kotlin-web-site,belovrv/kotlin-web-site,madvirus/kotlin-web-site,hltj/kotlin-web-site-cn,JetBrains/kotlin-web-site,hltj/kotlin-web-site-cn,meilalina/kotlin-web-site,JetBrains/kotlin-web-site,madvirus/kotlin-web-site,meilalina/kotlin-web-site,hltj/kotlin-web-site-cn,meilalina/kotlin-web-site,JetBrains/kotlin-web-site,meilalina/kotlin-web-site,madvirus/kotlin-web-site