unit-test: Update gtest source rev to fix std::span issue

The std::span does not support some gtest MACROS and is fixed in
https://github.com/google/googletest/pull/3195 and
https://github.com/google/googletest/commit/e4717df71a4f45bf9f0ac88c6cd9846a0bc248dd

Including the fixes to support std::span in gtests.

Match the openembedded gtest version in
https://github.com/openembedded/meta-openembedded/pull/564

Change-Id: Ia0171160ee7a0a36c2fb27eb441e25cdec9ba9f1
Signed-off-by: Willy Tu <wltu@google.com>
diff --git a/scripts/build-unit-test-docker b/scripts/build-unit-test-docker
index b8337f8..2a61834 100755
--- a/scripts/build-unit-test-docker
+++ b/scripts/build-unit-test-docker
@@ -139,7 +139,7 @@
     ),
     # Release 2021-06-12
     "google/googletest": PackageDef(
-        rev="release-1.11.0",
+        rev="9e712372214d75bb30ec2847a44bf124d48096f3",
         build_type="cmake",
         config_env=["CXXFLAGS=-std=c++20"],
         config_flags=["-DTHREADS_PREFER_PTHREAD_FLAG=ON"],