Add a note that 'call for participation' is empty

Author: phil-opp

content/this-month/2022-10/index.md

@@ -122,6 +122,12 @@ Want to contribute to a Rust OSDev project, but don't know where to start? Help
     - [(`repo_name`) Issue Description](https://example.com/link-to-issue)
 -->
 
+<span class="gray">
+
+_No tasks were proposed for this section this month._
+
+</span>
+
 If you maintain a Rust project related to operating system development and are looking for contributors, especially for tasks suited to people getting started in this space, please [create a PR](https://github.com/rust-osdev/homepage/pulls) against the `next` branch with the tasks you want to include in the next issue.
 
 ## Other Projects