fix ci build

Author: lovetodream

.github/workflows/test-latest.yml

@@ -9,7 +9,7 @@ on:
 jobs:
   test:
     container:
-      image: swift:latest-jammy
+      image: swift:jammy
     services:
       postgres:
         image: postgres

README.md

@@ -1,10 +1,12 @@
 # PostgresNIOMacros
 
+[![codecov](https://codecov.io/gh/lovetodream/postgres-nio-macros/graph/badge.svg?token=PLWUKYV0HO)](https://codecov.io/gh/lovetodream/postgres-nio-macros)
+
 Macros for [PostgresNIO](https://github.com/vapor/postgres-nio).
 
-## `@Statement(_:)`
+## `@Statement(_:)`[^1]
 
-<small>This macro was initially pitched to me by @fabianfett.</small>
+[^1]: This macro was initially pitched to me by [@fabianfett](https://github.com/fabianfett).
 
 Creates a `PostgresPreparedStatement` from a decorated query string.