Here's a list of PRs not covered in the changelog yet (according to git log v0.9.1..HEAD --oneline |grep "Merge pull request"). Dumping this here in case I don't finish making my own commit adding them:

Bigger ones
#701 Full support for entering and exiting DORMANT mode - andrewh42
#727 Implement embedded-io Read + Write for UartPeripheral - Sympatron

Smaller ones
#715 Add from_installed_program with correct shift direction - jannic
#718 Add a short explanation on how to use RingOscillator as a random number source - jannic
#720 Configure i2c pins with pull-up in rustdoc example - jannic

Very small fixes that can be combined as one entry in changelog
#716 Revert "Make i2c::controller pub again"
#743 Use namespaced (dep:) features for optional dependencies
#761 Bump msrv from 1.65 to 1.75
#762 Move on-target-tests back to the work space
#763 Bump rustc nightly for cargo udeps
#767 Rename .cargo/config to .cargo/config.toml
#776 Use as_ptr() to retrieve pointer to register
#777 Fix several clippy and cargo doc warnings
#778 Fix several clippy and cargo doc warnings
#779 Fix some more nightly clippy warnings

@9names: To avoid wasting your time: My recent commits were only a rebase, I didn't even notice your comment from earlier today. So there's no need to check if I added the missing changelog entries.

Thanks for reviewing, I'll look through your comment now.
(Many of the "very small" fixes were left out intentionally, stuff like "fix clippy warning" isn't noteworthy in the changelog, IMHO. But we can of course add one generic "several minor changes" entry listing the pull requests for completeness.)

Updated the changelog with the missing entries. I actually added that "Several cleanups and documentation updates" catch-all entry. Listing all these very small updates individually would be too much detail for my taste. But it's still good to list them at all: That way, it's much easier to check for missing entries.