Update versions for v1.9.15 (ava-labs#2779)

Author: StephenButtolph

RELEASES.md

@@ -1,5 +1,16 @@
 # Release Notes
 
+## [v1.9.15](https://github.com/ava-labs/avalanchego/releases/tag/v1.9.15)
+
+This version is backwards compatible to [v1.9.0](https://github.com/ava-labs/avalanchego/releases/tag/v1.9.0). It is optional, but encouraged. The supported plugin version is `24`.
+
+- Fixed `x/merkledb.ChangeProof#getLargestKey` to correctly handle no changes
+- Added test for `avm/txs/executor.SemanticVerifier#verifyFxUsage` with multiple valid fxs
+- Fixed CPU + bandwidth performance regression during vertex processing
+- Added example usage of the `/ext/index/X/block` API
+- Reduced the default value of `--snow-optimal-processing` from `50` to `10`
+- Updated the year in the license header
+
 ## [v1.9.14](https://github.com/ava-labs/avalanchego/releases/tag/v1.9.14)
 
 This version is backwards compatible to [v1.9.0](https://github.com/ava-labs/avalanchego/releases/tag/v1.9.0). It is optional, but encouraged. The supported plugin version is `24`.

version/compatibility.json

@@ -3,8 +3,8 @@
     "v1.9.10",
     "v1.9.11",
     "v1.9.12",
-    "v1.9.13",
-    "v1.9.14"
+    "v1.9.14",
+    "v1.9.15"
   ],
   "23": [
     "v1.9.9"

version/constants.go

@@ -21,7 +21,7 @@ var (
 	Current = &Semantic{
 		Major: 1,
 		Minor: 9,
-		Patch: 14,
+		Patch: 15,
 	}
 	CurrentApp = &Application{
 		Major: Current.Major,