docs: add release notes for 0.28.1 #15942

Job	Run time
resolve	7s
fmt	26s
semver-checks	40s
check-msrv	14m 17s
test-introspection-pr	50s
mypy-pytests	43s
clippy/powerpc64le-unknown-linux-gnu/stable	14m 34s
clippy/aarch64-apple-darwin/stable	13m 24s
careful	0s
clippy/wasm32-wasip1/stable	12m 41s
check-feature-powerset ${{ matrix.rust }}	0s
clippy/s390x-unknown-linux-gnu/stable	13m 16s
clippy/x86_64-unknown-linux-gnu/stable	14m 2s
clippy/x86_64-pc-windows-msvc/stable	13m 19s
clippy/aarch64-pc-windows-msvc/stable	13m 27s
clippy/x86_64-unknown-linux-gnu/beta	13m 18s
clippy/i686-pc-windows-msvc/stable	14m 32s
docsrs	0s
clippy/aarch64-unknown-linux-gnu/stable	13m 49s
test-cross-compilation-windows	0s
test-introspection	0s
valgrind	0s
python3.14-arm64 windows-11-arm rust-stable / build	18m 0s
python3.14-x64 ubuntu-latest rust-nightly / build	7m 39s
python3.14t-x64 ubuntu-latest rust-stable / build	5m 13s
python3.14-x86 windows-latest rust-stable / build	21m 38s
python3.14-x64 ubuntu-latest rust-stable / build	8m 0s
python3.14-x64 windows-latest rust-stable / build	21m 1s
emscripten	0s
python3.14-arm64 ubuntu-24.04-arm rust-stable / build	9m 44s
python${{ matrix.python-version }}-${{ matrix.platform.python-architecture }} ${{ matrix.platform.os }} rust-${{ matrix.rust }}	0s
python3.14-arm64 macos-latest rust-stable / build	10m 8s
wasm32-wasip1	0s
test-cross-compilation ${{ matrix.os }} -> ${{ matrix.target }}	0s
test-version-limits	0s
test-debug	0s
conclusion	3s
	4h 14m 51s

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