Install pyenv requirements

Author: haikalpribadi

.grabl/automation.yml

@@ -111,10 +111,12 @@ release:
       image: graknlabs-ubuntu-20.04
       type: foreground
       command: |
+        pyenv install -s 3.6.10
+        pyenv global 3.6.10 system
+        pip install certifi
         export ARTIFACT_USERNAME=$REPO_GRAKN_USERNAME
         export ARTIFACT_PASSWORD=$REPO_GRAKN_PASSWORD
         bazel run @graknlabs_dependencies//distribution/artifact:create-netrc
-        pip install certifi
         export RELEASE_NOTES_TOKEN=$REPO_GITHUB_TOKEN
         bazel run @graknlabs_dependencies//tool/release:create-notes -- console $(cat VERSION) ./RELEASE_TEMPLATE.md
         export DEPLOY_GITHUB_TOKEN=$REPO_GITHUB_TOKEN