Update NEWS and release step after 1.29.0 release

[kevinAlbs]

Summary

• Update NEWS
• Fix referenced branch for --sbom_branch
• Remove "Notify the PHP Driver Team" step

Background & Motivation

I expect the --sbom_branch in the release step to be master for a minor release. During the 1.29.0 release, running the +signed-release/dist target with --sbom_branch=r1.29 resulted in an HTTP 404:

+sbom-download | 2024-11-06T19:46:57.028494Z [error    ] Message get_asset_group failed [silk_api] content=b'{"detail":"The manual ingested asset with id `mongo-c-driver-r1.29` was not found"}' filename=silk_api.py func_name=_check_response headers=Headers({'date': 'Wed, 06 Nov 2024 19:46:56 GMT', 'content-type': 'application/json', 'content-length': '83', 'connection': 'keep-alive', 'server': 'uvicorn', 'x-cid': 'e9eb4d70-5cac-4d19-9b8d-08a0945e02a8', 'x-ratelimit-limit': '10', 'x-ratelimit-remaining': '9', 'x-ratelimit-reset': '1730922418', 'x-ratelimit-retryafter': '0'}) lineno=142 module=silk_api parsed=None status_code=<HTTPStatus.NOT_FOUND: 404>

This reminded me that the Silk asset group for a branch is expected to be created in Evergreen.

I expect the "Notify the PHP Driver Team" step is redundant. The PHP driver tests with the master branch of the C driver.

[vector-of-bool]

LGTM