Compile warning

[fmterrorf]

I'm seeing the following compile warnings.

Compiling 60 files (.ex)
    warning: <%# is deprecated, use <%!-- or add a space between <% and # instead
    │
  1 │ <%#
    │ ~
    │
    └─ lib/event_store/sql/statements/insert_events.sql.eex:1: (file)

    warning: <%# is deprecated, use <%!-- or add a space between <% and # instead
    │
 24 │   <%#
    │   ~
    │
    └─ lib/event_store/sql/statements/insert_events.sql.eex:24: (file)

I can make a PR later. Created this issue so that I don't forget about it