internal: fix kokoro path

Change-Id: Iab0b3810321d9601d0d1fe6db108102c26bc59ec
Reviewed-on: https://code-review.googlesource.com/c/35730
Reviewed-by: Jean de Klerk <deklerk@google.com>

internal/kokoro/test.sh

diff --git a/internal/kokoro/test.sh b/internal/kokoro/test.sh
index 16f0bf6..8a2e30c 100755
--- a/internal/kokoro/test.sh
+++ b/internal/kokoro/test.sh
@@ -9,7 +9,7 @@
 set -x
 
 # cd to project dir on Kokoro instance
-cd git/api
+cd git/google-api-go-client
 
 go version