fix(Readme): use raw pic src

Author: mydearxym

README.md

@@ -1,5 +1,5 @@
 
-![CPS Brand](https://github.com/mydearxym/mastani_server/blob/dev/docs/snapshots/cps_logo_md.png)
+![CPS Brand](https://github.com/mydearxym/mastani_server/blob/dev/docs/snapshots/cps_logo_md.png?raw=true)
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