Pin the Gitlab and HTTParty gems for safety

Signed-off-by: Rémy Coutable <remy@rymai.me>

.gitlab/ci/docs.gitlab-ci.yml

@@ -24,7 +24,8 @@
     - apk add --update openssl
     - wget $CI_PROJECT_URL/raw/$CI_COMMIT_SHA/scripts/trigger-build-docs
     - chmod 755 trigger-build-docs
-    - gem install gitlab --no-document
+    - gem install httparty --no-document --version 0.17.3
+    - gem install gitlab --no-document --version 4.13.0
 
 # Always trigger a docs build in gitlab-docs only on docs-only branches.
 # Useful to preview the docs changes live.

scripts/utils.sh

@@ -34,7 +34,8 @@ function install_api_client_dependencies_with_apt() {
 }
 
 function install_gitlab_gem() {
-  gem install gitlab --no-document
+  gem install httparty --no-document --version 0.17.3
+  gem install gitlab --no-document --version 4.13.0
 }
 
 function echoerr() {