Fix ECH-Server-RepeatedConfigID test.

The test was not actually using a repeated config ID.

Bug: 275
Change-Id: I69519fde196247abb07dceba1da1bac22188f13f
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/47912
Commit-Queue: David Benjamin <davidben@google.com>
Reviewed-by: Adam Langley <agl@google.com>

ssl/test/runner/runner.go

diff --git a/ssl/test/runner/runner.go b/ssl/test/runner/runner.go
index cc07d02..d00ab69 100644
--- a/ssl/test/runner/runner.go
+++ b/ssl/test/runner/runner.go
@@ -16584,8 +16584,8 @@
 				ClientECHConfig: echConfigRepeatID,
 			},
 			flags: []string{
-				"-ech-server-config", base64.StdEncoding.EncodeToString(MarshalECHConfig(echConfig3)),
-				"-ech-server-key", base64.StdEncoding.EncodeToString(key3),
+				"-ech-server-config", base64.StdEncoding.EncodeToString(MarshalECHConfig(echConfig)),
+				"-ech-server-key", base64.StdEncoding.EncodeToString(key),
 				"-ech-is-retry-config", "1",
 				"-ech-server-config", base64.StdEncoding.EncodeToString(MarshalECHConfig(echConfigRepeatID)),
 				"-ech-server-key", base64.StdEncoding.EncodeToString(keyRepeatID),