fix: update README logo to new memoria-logo asset (#52)

## What type of PR is this?

- [ ] feat (new feature)
- [ ] fix (bug fix)
- [ ] docs (documentation)
- [ ] style (formatting, no code change)
- [ ] refactor (code change that neither fixes a bug nor adds a feature)
- [ ] perf (performance improvement)
- [ ] test (adding or updating tests)
- [ ] chore (maintenance, tooling)
- [ ] build / ci (build or CI changes)

## Which issue(s) this PR fixes

Fixes #

## What this PR does / why we need it

Co-authored-by: dengn <dengn@aliyun.com>

Author: dengn

README.md

@@ -1,5 +1,5 @@
 <div align="center">
-  <img src="assets/logo.png" alt="Memoria Logo" width="300"/>
+  <img src="assets/memoria-logo.png" alt="Memoria Logo" width="300"/>
 
   # Memoria