fix(gh): Relativize file paths against GITHUB_WORKSPACE

action/format_gh.sh

@@ -2,8 +2,9 @@
 
 set -eu
 
-grep '"type":"typo"' |
-  jq --sort-keys --raw-output '"::warning file=\(.path),line=\(.line_num),col=\(.byte_offset)::\"\(.typo)\" should be \"" + (.corrections // [] | join("\" or \"") + "\".")' |
-  while IFS= read -r line; do
-    echo "$line"
-  done
+grep '"type":"typo"' | while IFS= read -r typo; do
+  original_path="$(echo "$typo" | jq --raw-output '.path')"
+  relative_path="$(realpath --relative-to="$GITHUB_WORKSPACE" "$original_path")"
+  echo "$typo" | jq --arg relative_path "$relative_path" --raw-output \
+    '"::warning file=\($relative_path),line=\(.line_num),col=\(.byte_offset)::\"\(.typo)\" should be \"" + (.corrections // [] | join("\" or \"") + "\".")'
+done