regres: Fix LLVM version

Can't download LLVM after
https://swiftshader-review.googlesource.com/c/SwiftShader/+/73488

Change-Id: Ie828a087bfa227d545dfa1359910f232c79e2b29
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/73490
Commit-Queue: Yuly Novikov <ynovikov@google.com>
Kokoro-Result: kokoro <noreply+kokoro@google.com>
Tested-by: Ben Clayton <bclayton@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>
Reviewed-by: Yuly Novikov <ynovikov@google.com>
Presubmit-Ready: Ben Clayton <bclayton@google.com>
diff --git a/tests/regres/llvm/llvm.go b/tests/regres/llvm/llvm.go
index 7d1d61b..dcb4e95 100644
--- a/tests/regres/llvm/llvm.go
+++ b/tests/regres/llvm/llvm.go
@@ -125,7 +125,7 @@
 		default:
 			return "", "", "", fmt.Errorf("Unsupported OS: %v", os)
 		}
-	case Version{17, 0, 0}:
+	case Version{17, 0, 6}:
 		switch os {
 		case "linux":
 			url = "https://github.com/llvm/llvm-project/releases/download/llvmorg-17.0.6/clang+llvm-17.0.6-x86_64-linux-gnu-ubuntu-22.04.tar.xz"