scripts/build-unit-test-docker: Update googletest to match openembedded

Promote `googletest` to v1.11 to match openembedded.
See https://github.com/openembedded/meta-openembedded/blob/master/meta-oe/recipes-test/googletest/googletest_git.bb#L7

Signed-off-by: Michael Shen <gpgpgp@google.com>
Change-Id: I19d315cffc6b7fffaddba7b07a4bd9c7d7533b8d
diff --git a/scripts/build-unit-test-docker b/scripts/build-unit-test-docker
index 0c6550a..a7486ff 100755
--- a/scripts/build-unit-test-docker
+++ b/scripts/build-unit-test-docker
@@ -137,9 +137,9 @@
             f"cp include/function2/function2.hpp {prefix}/include/function2/",
         ],
     ),
-    # Snapshot from 2021-05-13
+    # Release 2021-06-12
     "google/googletest": PackageDef(
-        rev="662fe38e44900c007eccb65a5d2ea19df7bd520e",
+        rev="release-1.11.0",
         build_type="cmake",
         config_env=["CXXFLAGS=-std=c++20"],
         config_flags=["-DTHREADS_PREFER_PTHREAD_FLAG=ON"],