chore(deps): Update dependency gradle.plugin.org.jetbrains.gradle.plugin.idea-ext:gradle-idea-ext to v1.4

Author: renovate[bot]

gradle/libs.versions.toml

@@ -68,7 +68,7 @@ build-indra = { module = "net.kyori:indra-common", version.ref = "indra" }
 build-indra-crossdoc = { module = "net.kyori:indra-crossdoc", version.ref = "indra" }
 build-indra-spotless = { module = "net.kyori:indra-licenser-spotless", version.ref = "indra" }
 build-configurate-transformations = { module = "ca.stellardrift:gradle-plugin-configurate", version = "6.2.0" }
-build-idea-ext = { module = "gradle.plugin.org.jetbrains.gradle.plugin.idea-ext:gradle-idea-ext", version = "1.3" }
+build-idea-ext = { module = "gradle.plugin.org.jetbrains.gradle.plugin.idea-ext:gradle-idea-ext", version = "1.4" }
 mod-publish-plugin = { module = "me.modmuss50:mod-publish-plugin", version.ref = "mod-publish-plugin" }
 
 # For Renovate, do not use directly