Merge branch 'chore/modify_ci_ssc_branch' into 'release/v2.1'

ci: modify ci ssc branch

See merge request sdk/ESP8266_RTOS_SDK!1154

Author: donghengqaz

.gitlab-ci.yml

@@ -42,7 +42,7 @@ build_ssc:
     - git clone $GITLAB_SSH_SERVER/yinling/SSC.git
     - cd SSC
     # try checkout same branch
-    - git checkout release/v3.0 || echo "Using default branch..."
+    - git checkout release/v2.1_8266 || echo "Using default branch..."
     - ./gen_misc_rtos.sh
 
 push_master_to_github: