chore(deps): update dependency https://deno.land/std to v0.212.0 (#77)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

src/workflow_gantt.ts

@@ -1,4 +1,4 @@
-import { sumOf } from "https://deno.land/std@0.211.0/collections/mod.ts";
+import { sumOf } from "https://deno.land/std@0.212.0/collections/mod.ts";
 import { format } from "npm:[email protected]";
 import { Workflow, WorkflowJobs } from "./github.ts";