doc: Improve benchmark section

Author: KSXGitHub

README.md

@@ -15,14 +15,19 @@ Summarize disk usage of the set of files, recursively for directories.
 
 Both `dust` (v0.5.4) and `dutree` (v0.12.5) do not utilize the parallel computing capability of Rust to improve performance.
 
-_Below is a benchmark sample of `pdu` (v0.0.0) against `dust`, `dutree`, and `du` (lower is better):_
-
-<a href="https://github.com/KSXGitHub/parallel-disk-usage-0.0.0-benchmarks/blob/master/tmp.benchmark-report.CHARTS.md">
-  <img
-    alt="benchmark pdu v0.0.0 against dust, dutree, and du"
-    src="https://ksxgithub.github.io/parallel-disk-usage-0.0.0-benchmarks/tmp.benchmark-report.competing.blksize.svg"
-  >
-</a>
+## Benchmark
+
+The benchmark was generated by [a GitHub Workflow](https://github.com/KSXGitHub/parallel-disk-usage/blob/0.0.0/.github/workflows/deploy.yaml#L458-L608).
+
+<figure>
+  <img src="https://ksxgithub.github.io/parallel-disk-usage-0.0.0-benchmarks/tmp.benchmark-report.competing.blksize.svg">
+  <figcaption align="center">
+    benchmark <code>pdu</code> v0.0.0 against <code>dust</code>, <code>dutree</code>, and <code>du</code>
+    <em>(lower is better)</em>
+  </figcaption>
+</figure>
+
+[_(See more)_](https://github.com/KSXGitHub/parallel-disk-usage-0.0.0-benchmarks/blob/master/tmp.benchmark-report.CHARTS.md)
 
 ## Demo