Obvious better solution is to either a.) not write those release notes b.) try to figure out release notes format and process that leads to useful release notes. Once it is useful, you can decide to automate it or not - and measure whether automation is still achieving the goal.

What OP did was "we lacked communication, then created ineffective process that achieved nothing, so we automated the ineffective process and pay third party for doing it".

If you pay tokens for release notes that nobody reads, they you may just ... not pay tokens.