[ci skip] Use correct heading levels

Author: esotericenderman

README.md

@@ -6,12 +6,12 @@
 
 ## Credits
 
-## SCPs
+### SCPs
 
 - "[SCP-018](https://scpwiki.com/scp-018)" by Epic Phail Spy licensed under [CC BY-SA](./LICENSE).
 - "[SCP-268](https://scpwiki.com/scp-268)" by Pair Of Ducks licensed under [CC BY-SA](./LICENSE).
 
-## Assets
+### Assets
 
 The following assets were used as starting points in creating the resource pack assets. They were pixelated and altered to be more "Minecraft-like".