Use SPDX identifier in POMs (#2936)

This replaces the custom name with an SPDX identifier to enable tooling to automatically detect the correct license.

See https://spdx.org/licenses/Apache-2.0.html
diff --git a/buildSrc/src/main/kotlin/publishing-conventions.gradle.kts b/buildSrc/src/main/kotlin/publishing-conventions.gradle.kts
index 6d0d3bf..82a9296 100644
--- a/buildSrc/src/main/kotlin/publishing-conventions.gradle.kts
+++ b/buildSrc/src/main/kotlin/publishing-conventions.gradle.kts
@@ -152,7 +152,7 @@
 
     licenses {
         license {
-            name = "The Apache Software License, Version 2.0"
+            name = "Apache-2.0"
             url = "https://www.apache.org/licenses/LICENSE-2.0.txt"
             distribution = "repo"
         }