ICU-22677 update LICENSE and README.md and pom.xml

- unicode-org/.github#15
- use Unicode-3.0 in pom instead of raw license link
- unicode-org/.github#15

Author: srl295

LICENSE

@@ -2,7 +2,7 @@ UNICODE LICENSE V3
 
 COPYRIGHT AND PERMISSION NOTICE
 
-Copyright © 2016-2023 Unicode, Inc.
+Copyright © 2016-2024 Unicode, Inc.
 
 NOTICE TO USER: Carefully read the following legal agreement. BY
 DOWNLOADING, INSTALLING, COPYING OR OTHERWISE USING DATA FILES, AND/OR
@@ -38,6 +38,8 @@ not be used in advertising or otherwise to promote the sale, use or other
 dealings in these Data Files or Software without prior written
 authorization of the copyright holder.
 
+SPDX-License-Identifier: Unicode-3.0
+
 ----------------------------------------------------------------------
 
 Third-Party Software Licenses

README.md

@@ -35,7 +35,7 @@ OpenSSF Scorecard | [![OpenSSF Scorecard](https://api.securityscorecards.dev/pro
 
 ### Copyright & Licenses
 
-Copyright © 2016-2023 Unicode, Inc. Unicode and the Unicode Logo are registered trademarks of Unicode, Inc. in the United States and other countries.
+Copyright © 2016-2024 Unicode, Inc. Unicode and the Unicode Logo are registered trademarks of Unicode, Inc. in the United States and other countries.
 
 The project is released under [LICENSE](./LICENSE).
 

icu4j/maven-migration/pom.xml

@@ -104,7 +104,7 @@
 
   <licenses>
     <license>
-      <name>Unicode/ICU License</name>
+      <name>Unicode-3.0</name>
       <url>https://raw.githubusercontent.com/unicode-org/icu/main/LICENSE</url>
       <distribution>repo</distribution>
     </license>

icu4j/pom.xml

@@ -105,7 +105,7 @@
 
   <licenses>
     <license>
-      <name>Unicode/ICU License</name>
+      <name>Unicode-3.0</name>
       <url>https://raw.githubusercontent.com/unicode-org/icu/main/LICENSE</url>
       <distribution>repo</distribution>
     </license>