Update license info

LICENSE

@@ -0,0 +1,40 @@
+MIT License
+
+Copyright (c) 2024 The World Bank Group
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+
+---
+
+WORLD BANK IGO RIDER
+
+The World Bank Group ("WBG") is an intergovernmental organization established by
+Articles of Agreement among its member countries, and enjoys certain privileges,
+immunities and exemptions under international law or treaty, including, without
+limitation, under the Convention on the Privileges and Immunities of the Specialized
+Agencies, as may be amended from time to time. Nothing in this MIT License shall
+constitute or be considered to be a limitation upon or a waiver of, whether express
+or implied, any of the privileges, immunities and exemptions of the WBG, including
+without limitation, immunity from suit and legal process, inviolability of its
+premises, archives and documents, and exemption from taxes and customs duties, which
+the WBG may have or may hereafter come to have.
+
+The MIT License is granted subject to the understanding that the WBG may have
+interests, rights, or privileges worldwide in the Software, and the WBG may use,
+publish, reproduce, distribute, display, or disclose the Software without limitation.

README.md

@@ -3,7 +3,7 @@ language:
 - en
 - fr
 - es
-license: unknown
+license: mit
 size_categories:
 - n<1K
 task_categories:
@@ -204,7 +204,7 @@ Top-level fields:
 The annotations were produced through human labeling using Label Studio.
 
 ## Licensing information
-unknown
+MIT License — see [LICENSE](LICENSE) for details.
 
 ## Citation information
 ```bibtex