encode the start and end points

encode the start and end points in the url as suggested by nnethercote, thanks!

Author: pnkfelix

triage/2022-08-02.md

@@ -2,7 +2,7 @@
 
 A good week! We had one regression from [#99123](https://github.com/rust-lang/rust/pull/99123)
 that could use further study, but we had a huge swath of improvements. The downward trend of the
-[performance graph summary](https://perf.rust-lang.org/?start=&end=&kind=percentfromfirst&stat=instructions%3Au)
+[performance graph summary](https://perf.rust-lang.org/?start=2022-07-04&end=2022-08-03&kind=percentfromfirst&stat=instructions%3Au)
 is striking. Perhaps best of all: Only *one* rollup PR impacted performance this week which makes
 things so much easier to evaluate! Great work everyone!