internal: give tests more time

Tests are bumping up to the 45m limit. Bump limit to 60m.

See: https://sponge.corp.google.com/target?id=a4aaa4db-d5af-442d-9308-f6cd064b4522&target=cloud-go-libraries/google-cloud-go/continuous/go112&searchFor=&show=ALL&sortBy=STATUS
Change-Id: I9a4118c071a9362378127cdbcf354e3d60a026a1
Reviewed-on: https://code-review.googlesource.com/c/gocloud/+/42291
Reviewed-by: Emmanuel Odeke <emmanuel@orijtech.com>
diff --git a/internal/kokoro/continuous.sh b/internal/kokoro/continuous.sh
index f08881f..dfd3232 100755
--- a/internal/kokoro/continuous.sh
+++ b/internal/kokoro/continuous.sh
@@ -70,6 +70,6 @@
 trap create_junit_xml EXIT ERR
 
 # Run tests and tee output to log file, to be pushed to GCS as artifact.
-go test -race -v -timeout 45m ./... 2>&1 \
+go test -race -v -timeout 60m ./... 2>&1 \
   | tee $KOKORO_ARTIFACTS_DIR/$KOKORO_GERRIT_CHANGE_NUMBER.txt