fix(decorate-pr): replace piped while-read with process substitution for docs-only detection

decorate-pr/action.yml

@@ -229,7 +229,7 @@ runs:
         has_qualifying_changes=false
 
         if [[ "$total_files" -gt 0 ]]; then
-          printf '%s' "$diff_data" | jq -r '.[].filename' 2>/dev/null | while read -r filename; do
+          while IFS= read -r filename; do
             # Check if file matches docs globs
             is_doc=false
             IFS=',' read -ra glob_array <<< "$DOCS_GLOBS"
@@ -242,7 +242,7 @@ runs:
               fi
             done
 
-            # .md files are always docs unless they're actual code docs with changes
+            # .md files are always docs
             if [[ "$filename" == *.md ]]; then
               is_doc=true
             fi
@@ -250,7 +250,7 @@ runs:
             if [[ "$is_doc" != "true" ]]; then
               docs_only_true=false
             fi
-          done
+          done < <(printf '%s' "$diff_data" | jq -r '.[].filename' 2>/dev/null)
         fi
 
         # Get changeset for changelog file