Fix indentation on build-ami.yml (#500)

Author: 0x2b3bfa0

.github/workflows/build-ami.yml

@@ -12,5 +12,5 @@ jobs:
           packer init environment
           packer build environment
         env:
-            AWS_SECRET_ACCESS_KEY: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
-            AWS_ACCESS_KEY_ID: ${{ secrets.AWS_ACCESS_KEY_ID }}
+          AWS_SECRET_ACCESS_KEY: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
+          AWS_ACCESS_KEY_ID: ${{ secrets.AWS_ACCESS_KEY_ID }}