JDK compat page: add JDK 23 (early access)

Author: SethTisue

_overviews/jdk-compatibility/overview.md

@@ -14,6 +14,7 @@ Minimum Scala versions:
 
 | JDK         | 3        | 2.13      | 2.12      | 2.11       |
 |:-----------:|:--------:|:---------:|:---------:|:----------:|
+| 23 (ea)     | 3.3.5*   | 2.13.14*  | 2.12.20*  |            |
 | 22          | 3.3.4*   | 2.13.12   | 2.12.19   |            |
 | 21 (LTS)    | 3.3.1    | 2.13.11   | 2.12.18   |            |
 | 17 (LTS)    | 3.0.0    | 2.13.6    | 2.12.15   |            |
@@ -120,6 +121,15 @@ series. (Support may be available in nightly builds.)
 
 For possible Scala issues, see the [jdk11](https://github.com/scala/bug/labels/jdk11), [jdk17](https://github.com/scala/bug/labels/jdk17), and [jdk21](https://github.com/scala/bug/labels/jdk21) labels in the Scala 2 bug tracker.
 
+## JDK 23 compatibility notes
+
+Early access builds of JDK 23 are available. JDK 23 will be non-LTS.
+
+We are working on adding JDK 22 support to Scala 3 and Scala 2.
+(Support may be available in nightly builds.)
+
+For possible Scala issues, see the [jdk11](https://github.com/scala/bug/labels/jdk11), [jdk17](https://github.com/scala/bug/labels/jdk17), and [jdk21](https://github.com/scala/bug/labels/jdk21) labels in the Scala 2 bug tracker.
+
 ## GraalVM Native Image compatibility notes
 
 There are several records of successfully using Scala with [GraalVM](https://www.graalvm.org) Native Image (i.e., ahead of time compiler) to produce directly executable binaries.