Update README.md (#633)

serenachou · pquentin · web-flow · commit 4e6219de1a02 · 2023-09-28T12:10:43.000+02:00
the license link at the bottom resolves to a 404

Co-authored-by: Quentin Pradet &lt;quentin.pradet@gmail.com&gt;
diff --git a/README.md b/README.md
@@ -42,4 +42,4 @@ See [CONTRIBUTING.md](./CONTRIBUTING.md)
 
 ## Licence
 
-This software is licensed under the [Apache License 2.0](https://github.com/elastic/elasticsearch-java/blob/main/LICENSE).
+This software is licensed under the [Apache License 2.0](https://github.com/elastic/elasticsearch-java/blob/main/LICENSE.txt).

Original file line number	Diff line number	Diff line change
`@@ -42,4 +42,4 @@ See [CONTRIBUTING.md](./CONTRIBUTING.md)`
`42`	`42`
`43`	`43`	`## Licence`
`44`	`44`
`45`		`-This software is licensed under the [Apache License 2.0](https://github.com/elastic/elasticsearch-java/blob/main/LICENSE).`
	`45`	`+This software is licensed under the [Apache License 2.0](https://github.com/elastic/elasticsearch-java/blob/main/LICENSE.txt).`