docs: backtick parameter references in API comments

source/strpool/strpool.hon

@@ -18,7 +18,7 @@ StringPool :: struct {
     allocator mem.Allocator
 }
 
-#! retains allocator for interned copies and indexes; the caller owns the pool.
+#! retains `allocator` for interned copies and indexes; the caller owns the pool.
 init proc(allocator mem.Allocator) StringPool {
     return StringPool{
         ids = hashmap.init(allocator),