fix: invalid deployment branch (#485)

Author: gfyrag

Earthfile

@@ -1,7 +1,7 @@
 VERSION 0.8
 PROJECT FormanceHQ/payments
 
-ARG core=github.com/formancehq/earthly:tags/v0.19.1
+ARG core=github.com/formancehq/earthly:main
 IMPORT $core AS core
 
 FROM core+base-image
@@ -68,4 +68,4 @@ release:
 
 openapi:
     COPY openapi.yaml /openapi.yaml
-    SAVE ARTIFACT /openapi.yaml AS LOCAL openapi.yaml
+    SAVE ARTIFACT /openapi.yaml AS LOCAL openapi.yaml