ci: use more compatible strftime formats Windows lacks %F and %T formats for strftime. Expand them to the year/month/day and hour/minute/second formats, respectively.
diff --git a/tests/clar/summary.h b/tests/clar/summary.h
index 491f345..1af110e 100644
--- a/tests/clar/summary.h
+++ b/tests/clar/summary.h
@@ -26,7 +26,7 @@ int clar_summary_testsuite(struct clar_summary *summary,
struct tm *tm = localtime(×tamp);
char iso_dt[20];
- if (strftime(iso_dt, sizeof(iso_dt), "%FT%T", tm) == 0)
+ if (strftime(iso_dt, sizeof(iso_dt), "%Y-%m-%dT%H:%M:%S", tm) == 0)
return -1;
return fprintf(summary->fp, "\t<testsuite "