Update dependency protoc to v29.6

[renovate]

This PR contains the following updates:

Package	Update	Change
protoc	minor	29.3 → 29.6

---

Release Notes

protocolbuffers/protobuf (protoc)

v29.6: Protocol Buffers v29.6

Compare Source

Announcements

• Protobuf News may include additional announcements or pre-announcements for upcoming changes.

C++

• Fix warning about implicit capture of 'this' with '=' (#​22083) (afede60)

Python

• Fix Any recursion depth bypass in Python json_format.ParseDict (#​25239) (#​25587) (5ebddcb)
• Extend gencode compatibility support back to 3.20.0 (#​22423) (a532f52)
• [numpy] Fix breakage in users of Python protobufs under NumPy 2.3rc1. (#​22171) (c6c8a17)

PHP

• Bump version dependencies on phpunit/phpunit to ">=10.5.62 <11.0.0" (#​25589) (f340323)
• Protobuf: update php from macos-13 to macos-15-intel (#​24776) (1ca37de)
• Upgrade setup-php to speed up PHP tests (#​24405) (bc64ed9)

Python

• Don't run python tests on windows, which aren't supported anyway (#​25598) (cbfc703)

Other

• Don't ignore platform requirements (87743f6)
• Update github major version tags to be formatted v..<MI… (#​22358) (09082d4)
• Drop windows-2019 runners from CI (#​22186) (39cd25b)

v29.5: Protocol Buffers v29.5

Compare Source

Announcements

• Protobuf News may include additional announcements or pre-announcements for upcoming changes.

C++

• Remove fast-path check for non-clang compilers in MessageCreator. (#​21612) (69cca9b)

Java

• Add volatile to featuresResolved (#​20767) (128f0aa)

Python

• Add recursion depth limits to pure python (05ba1a8)
• Internal pure python fixes (1ef3f01)
• Fix: contains check segfaults on empty map (#​20446) (#​20904) (21fdb7a)

Other

• Re-enable aarch64 tests. (#​20853) (03c50e3)

v29.4: Protocol Buffers v29.4

Compare Source

Announcements

• Protobuf News may include additional announcements or pre-announcements for upcoming changes.

Java

• Fix Java concurrency issue in feature resolution for old <=3.25.x gencode using lazy feature resolution. (#​20750) (ce59907)

---

Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• If you want to rebase/retry this PR, check this box

---

This PR was generated by Mend Renovate. View the repository job log.