use congo thumb and cover images (#39)

#### 📖 Summary

<!-- Provide a summary of your changes. Describe the why and not how. -->

#### 📑 Test Plan

> 💡 Select your test plan for the code changes.

- [x] CI pipeline
- [ ] Custom test
- [ ] No test plan

##### Details / Justification

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#### 📚 Additional Notes

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Co-authored-by: OCram85 <marco.blessing@googlemail.com>
Reviewed-on: #39

content/posts/pscredentialstore-update/index.md

@@ -20,8 +20,6 @@ tags: ['PSCredentialStore']
 # sharingLinks: [null]
 ---
 
-![PSCredLogo](https://gitea.ocram85.com/OCram85/PSCredentialStore/raw/branch/master/assets/social-logo.png)
-
 <p align="right">
   <img src="https://forthebadge.com/images/badges/built-with-love.svg">
 </p>