Fixed S3 secret key configuration

S3 access key was used as secret key

tasks/register-runner.yml

@@ -28,7 +28,7 @@
     --cache-type '{{ gitlab_runner_cache_type }}'
     --cache-s3-server-address '{{ gitlab_runner_cache_s3_server_address }}'
     --cache-s3-access-key '{{ gitlab_runner_cache_s3_access_key }}'
-    --cache-s3-secret-key '{{ gitlab_runner_cache_s3_access_key }}'
+    --cache-s3-secret-key '{{ gitlab_runner_cache_s3_secret_key }}'
     --cache-s3-bucket-name '{{ gitlab_runner_cache_s3_bucket_name }}'
     --cache-s3-insecure '{{ gitlab_runner_cache_s3_insecure }}'
     --cache-cache-shared '{{ gitlab_runner_cache_cache_shared }}'