Avoid awkward indentation on try-finished comment

Author: Mark-Simulacrum

site/src/github.rs

@@ -610,17 +610,17 @@ pub async fn post_finished(data: &InputData) {
                 format!(
                     "Finished benchmarking try commit ({}): [comparison url]({}).
 
-                    Benchmarking this pull request likely means that it is \
-                    perf-sensitive, so we're automatically marking it as not fit \
-                    for rolling up. Please note that if the perf results are \
-                    neutral, you should likely undo the rollup=never given below \
-                    by specifying `rollup-` to bors.
+Benchmarking this pull request likely means that it is \
+perf-sensitive, so we're automatically marking it as not fit \
+for rolling up. Please note that if the perf results are \
+neutral, you should likely undo the rollup=never given below \
+by specifying `rollup-` to bors.
 
-                    Importantly, though, if the results of this run are \
-                    non-neutral **do not** roll this PR up -- it will mask other \
-                    regressions or improvements in the roll up.
+Importantly, though, if the results of this run are \
+non-neutral **do not** roll this PR up -- it will mask other \
+regressions or improvements in the roll up.
 
-                    @bors rollup=never",
+@bors rollup=never",
                     commit.sha, comparison_url
                 ),
             )