Update workflow files and README.md (#166)

.github/workflows/close_inactive.yml

+name: Close inactive issues
+on:
+  schedule:
+    - cron: "0 0 * * *"
+
+jobs:
+  close-issues:
+    runs-on: ubuntu-latest
+    permissions:
+      issues: write
+      pull-requests: write
+    steps:
+      - uses: actions/stale@v3
+        with:
+          days-before-issue-stale: 14
+          days-before-issue-close: 14
+          stale-issue-label: "stale"
+          stale-issue-message: "This issue is stale because it has been open for 14 days with no activity."
+          close-issue-message: "This issue was closed because it has been inactive for 14 days since being marked as stale."
+          days-before-pr-stale: 14
+          days-before-pr-close: 14
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
\ No newline at end of file

README.md

 # Colossal-AI
 
-![logo](./docs/images/Colossal-AI_logo.png)
+[![logo](./docs/images/Colossal-AI_logo.png)](https://www.colossalai.org/)
 
 <div align="center">
    <h3> <a href="https://arxiv.org/abs/2110.14883"> Paper </a> | <a href="https://www.colossalai.org/"> Documentation </a> | <a href="https://github.com/hpcaitech/ColossalAI/discussions"> Forum </a> | <a href="https://medium.com/@hpcaitech"> Blog </a></h3>
+   
+   [![Build](https://github.com/hpcaitech/ColossalAI/actions/workflows/build.yml/badge.svg)](https://github.com/hpcaitech/ColossalAI/actions/workflows/build.yml)
+   [![Documentation](https://readthedocs.org/projects/colossalai/badge/?version=latest)](https://colossalai.readthedocs.io/en/latest/?badge=latest)
 </div>
 An integrated large-scale model training system with efficient parallelization techniques.