sigstore: prep 3.6.1 (#1263)

Signed-off-by: William Woodruff <william@trailofbits.com>

prep 3.6.0 (#1248)

prep 3.5.3

Signed-off-by: William Woodruff <william@trailofbits.com>

CHANGELOG: prep 3.5.2

Signed-off-by: William Woodruff <william@trailofbits.com>

sigstore: prep 3.5.1 (#1193)

Prep 3.5.0 (#1184)

prep 3.4.0 (#1168)

prep 3.3.0 (#1129)

prep 3.2.0 (#1094)