Replace buildDir with layout.buildDirectory

https://docs.gradle.org/current/userguide/upgrading_version_8.html#project_builddir

Author: trivikr

build.gradle.kts

@@ -68,7 +68,7 @@ jreleaser {
                     snapshotUrl = "https://aws.oss.sonatype.org/content/repositories/snapshots"
                     closeRepository.set(true)
                     releaseRepository.set(true)
-                    stagingRepositories.add("${rootProject.buildDir}/staging")
+                    stagingRepositories.add("${rootProject.layout.buildDirectory}/staging")
                 }
             }
         }

buildSrc/src/main/kotlin/smithy-gradle-plugin.plugin-conventions.gradle.kts

@@ -29,7 +29,7 @@ publishing {
     repositories {
         maven {
             name = "stagingRepository"
-            url = uri("${rootProject.buildDir}/staging")
+            url = uri("${rootProject.layout.buildDirectory}/staging")
         }
     }
     // Add license spec to all maven publications
@@ -157,7 +157,7 @@ tasks.jacocoTestReport {
     reports {
         xml.required.set(false)
         csv.required.set(false)
-        html.outputLocation.set(file("$buildDir/reports/jacoco"))
+        html.outputLocation.set(file("${layout.buildDirectory}/reports/jacoco"))
     }
 }