treat benchmark.md as raw text in benchmark.nu

Author: 2bndy5

benchmark/benchmark.nu

@@ -150,7 +150,7 @@ export def run-hyperfine [
 export def summarize [] {
     let data = open benchmark.json
     let results = $data | get results | reject "times" "exit_codes"
-    let summary = open benchmark.md
+    let summary = open --raw benchmark.md
     let summary_file = if ($env | get --optional GITHUB_STEP_SUMMARY | is-not-empty) {
         $"\n# Results\n\n($summary)" | save --append $env.GITHUB_STEP_SUMMARY
     } else {