Fetch tags in gh action release workflow (#33)

Summary:
### Motivation

We are bitten by actions/checkout#100 [yet again](facebookresearch/pplbench#52), so lets just fetch the tags during checkout.

### Changes proposed

Fetch tags during `actions/checkout`

Pull Request resolved: #33

Test Plan: https://github.com/facebookincubator/flowtorch/runs/2586537945?check_suite_focus=true

Reviewed By: jpchen, horizon-blue

Differential Revision: D28449241

Pulled By: feynmanliang

fbshipit-source-id: bf7224961a28fc7b2fd1e4733e519be6e0030590

.github/workflows/deploy-on-release.yml

@@ -48,6 +48,8 @@ jobs:
     steps:
     - name: Checkout
       uses: actions/checkout@v2
+      with:
+        fetch-depth: 0
     - name: Set up Python 3.7
       uses: actions/setup-python@v2
       with: