Update Linux plot

Signed-off-by: Vadim Markovtsev <vadim@sourced.tech>

README.md

@@ -40,7 +40,7 @@ Blog posts: [1](https://blog.sourced.tech/post/hercules.v4), [2](https://blog.so
 <p align="center">The DAG of burndown and couples analyses with UAST diff refining. Generated with <code>hercules --burndown --burndown-people --couples --feature=uast --dry-run --dump-dag doc/dag.dot https://github.com/src-d/hercules</code></p>
 
 ![git/git image](doc/linux.png)
-<p align="center">torvalds/linux line burndown (granularity 30, sampling 30, resampled by year). Generated with <code>hercules --burndown --first-parent --pb https://github.com/torvalds/linux | python3 labours.py -f pb -m burndown-project</code></p>
+<p align="center">torvalds/linux line burndown (granularity 30, sampling 30, resampled by year). Generated with <code>hercules --burndown --first-parent --pb https://github.com/torvalds/linux | python3 labours.py -f pb -m burndown-project</code> in 1h 40min.</p>
 
 ## Installation
 
@@ -429,4 +429,4 @@ fail with an OOM. You should try the following:
 2. Use `--skip-blacklist` to avoid analyzing the unwanted files. It is also possible to constrain the `--language`.
 3. Use the [hibernation](doc/HIBERNATION.md) feature: `--hibernation-distance 10 --burndown-hibernation-threshold=1000`. Play with those two numbers to start hibernating right before the OOM.
 4. Hibernate on disk: `--burndown-hibernation-disk --burndown-hibernation-dir /path`.
-5. `--first-parent`, you win.
+5. `--first-parent`, you win.