Fix repository configuration not being recognized

Signed-off-by: magic_rb <[email protected]>

buildbot_nix/buildbot_nix/repo_config/__init__.py

@@ -33,7 +33,7 @@ async def extract_during_step(cls, buildstep: BuildStepShellMixin) -> Self:
             command=[
                 "sh",
                 "-c",
-                "if [ -f buildbot-nix.toml ] then; then cat buildbot-nix.toml; fi",
+                "if [ -f buildbot-nix.toml ]; then cat buildbot-nix.toml; fi",
             ],
         )
         await buildstep.runCommand(cmd)