releaser: Fix some issue regexps

[bep]

Re. -- skip releaser prefix.

releaser: Add "note" to Note regexp 3473e31 @bep
releaser: Rework and simplify to use GitHub only for release notes 24a893c @bep
releaser: Add release notes to /docs for release of 0.89.4 ab01ba6 @bep
releaser: Add release notes for 0.89.4 [ci skip] f97da9e @bep
releaser: Add release notes to /docs for release of 0.89.3 c88cdb5 @bep
releaser: Add release notes for 0.89.3 [ci skip] bf489b9 @bep
releaser: Add release notes to /docs for release of 0.89.2 63e3a5e @bep
releaser: Add release notes for 0.89.2 [ci skip] cf3eb58 @bep
releaser: Add release notes to /docs for release of 0.89.1 b6a4ae4 @bep
releaser: Add release notes for 0.89.1 [ci skip] a074102 @bep 
releaser: Prepare repository for 0.90.0-DEV 41e9e9fe [@bep](https://github.com/bep)