Bump Bazel version to 3.7.0

Change-Id: Ifa611bbec87260c0d4db1bb2e1c6253fb8e394d8
diff --git a/.bazelversion b/.bazelversion
index 1545d96..7c69a55 100644
--- a/.bazelversion
+++ b/.bazelversion
@@ -1 +1 @@
-3.5.0
+3.7.0