chore(deps): update dependency com_google_googletest to v1.16.0

Author: renovate[bot]

tests/WORKSPACE

@@ -205,9 +205,9 @@ http_archive(
 # As a test dep of com_google_absl.
 http_archive(
     name = "com_google_googletest",
-    sha256 = "7b42b4d6ed48810c5362c265a17faebe90dc2373c885e5216439d37927f02926",
-    strip_prefix = "googletest-1.15.2",
-    urls = ["https://github.com/google/googletest/archive/v1.15.2.tar.gz"],
+    sha256 = "78c676fc63881529bf97bf9d45948d905a66833fbfa5318ea2cd7478cb98f399",
+    strip_prefix = "googletest-1.16.0",
+    urls = ["https://github.com/google/googletest/archive/v1.16.0.tar.gz"],
 )
 
 http_archive(