ci: update material-unit-tests commit (angular#32485)

Updates the SHA that will be tested against in the `material-unit-tests` job
to the latest commit in the components repository. SHA 2817c9e
is needed in order to make the `material-unit-tests` job pass after the remove
of the `protractor_web_test_suite` bazel rule from @angular/bazel. `protractor_web_test_suite` is
now provided by the @bazel/protractor npm package.

PR Close angular#32485

.circleci/config.yml

@@ -190,7 +190,7 @@ var_14: &notify_dev_infra_on_fail
 
 # Cache key for the Material unit tests job. **Note** when updating the SHA in the cache keys,
 # also update the SHA for the "MATERIAL_REPO_COMMIT" environment variable.
-var_15: &material_unit_tests_cache_key v4-angular-material-18b9ef3f5529f0fa8f034944681486447af7b879
+var_15: &material_unit_tests_cache_key v4-angular-material-2817c9e2faa4140342336987a692d5dd30bf24c2
 var_16: &material_unit_tests_cache_key_short v4-angular-material
 
 version: 2

.circleci/env.sh

@@ -84,7 +84,7 @@ setPublicVar MATERIAL_REPO_TMP_DIR "/tmp/material2"
 setPublicVar MATERIAL_REPO_URL "https://github.com/angular/material2.git"
 setPublicVar MATERIAL_REPO_BRANCH "master"
 # **NOTE**: When updating the commit SHA, also update the cache key in the CircleCI "config.yml".
-setPublicVar MATERIAL_REPO_COMMIT "18b9ef3f5529f0fa8f034944681486447af7b879"
+setPublicVar MATERIAL_REPO_COMMIT "2817c9e2faa4140342336987a692d5dd30bf24c2"
 
 # Source `$BASH_ENV` to make the variables available immediately.
 source $BASH_ENV;