Fix README formatting

Author: bogsi17

README.md

@@ -94,7 +94,6 @@ it's important to start the workflow from the `main` branch and specify the tag
 as input. This is because only workflows from the `main` branch can authenticate with the
 production AWS account.
 
-````yaml
 #### When `release` and `main` have diverged
 
 There are cases when `release` won't be fast-forwardable to the release
@@ -110,7 +109,7 @@ git checkout release
 git pull origin release
 git reset --hard v1.0.0-rc1
 git push --tags origin release
-````
+```
 
 And then you can follow the instructions above about creating the release tag
 and deploying.