fix(depot-scanner): Reenable CI runs

(zseri:) It seems like relativePath should be replaced with relativeFlag,
as no variable with the former name exists, a boolean is as far as I can
tell expected, and a boolean with a similar name exists. Lets give it a
try in the CI.

Change-Id: I0e7e522a41a517a38222dcda3b66731344613c1e
Reviewed-on: https://cl.tvl.fyi/c/depot/+/3581
Reviewed-by: tazjin <mail@tazj.in>
Autosubmit: tazjin <mail@tazj.in>
Tested-by: BuildkiteCI

tools/depot-scanner/default.nix

@@ -13,4 +13,4 @@ in depot.nix.buildGo.program {
   deps = [
     localProto
   ];
-} // { inherit localProto; meta.ci = false; }
+} // { inherit localProto; }