Roll cmake to 3.16.1

Change-Id: I4c23f2847b9e1cdd60f073dbb4a49d80b91fa33a
diff --git a/pw_env_setup/py/pw_env_setup/cipd_setup/pigweed.json b/pw_env_setup/py/pw_env_setup/cipd_setup/pigweed.json
index d6727ad..4bf6339 100644
--- a/pw_env_setup/py/pw_env_setup/cipd_setup/pigweed.json
+++ b/pw_env_setup/py/pw_env_setup/cipd_setup/pigweed.json
@@ -14,7 +14,7 @@
     {
         "path": "infra/cmake/${platform}",
         "tags": [
-            "version:3.14.6"
+            "version:3.16.1"
         ]
     },
     {