Fix release publisher warnings

[mrocklin]

Release Drafter v7 no longer accepts disable-autolabeler, so remove that stale input.

Pass github.sha as commitish so tag-triggered releases target the release commit instead of falling back to the default branch.

[github-actions]

Unit Test Results

See test report for an extended history of previous test failures. This is useful for diagnosing flaky tests.

    40 files  ±  0      40 suites  ±0   14h 32m 31s ⏱️ + 20m 38s
 4 153 tests  -   2   3 972 ✅ +  1    178 💤  -  2  3 ❌  - 1 
80 818 runs  +297  76 578 ✅ +287  4 237 💤 +11  3 ❌  - 1 

For more details on these failures, see this check.

Results for commit cec1c7c. ± Comparison against base commit aa2ddc3.

This pull request removes 2 tests.

distributed.cli.tests.test_dask_worker.test_listen_address_ipv6[tcp:..[ ‑ 1]:---nanny]
distributed.cli.tests.test_dask_worker.test_listen_address_ipv6[tcp:..[ ‑ 1]:---no-nanny]