Pin GitHub Actions to commit SHAs

[Smaug123]

Generated by github-infra.

Pins GitHub Actions references to immutable commit SHAs:

• .github/workflows/dotnet.yaml: actions/checkout@master -> actions/checkout@61b9e3751b92087fd0b06925ba6dd6314e06f089 # master
• .github/workflows/dotnet.yaml: actions/checkout@v6 -> actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
• .github/workflows/dotnet.yaml: actions/download-artifact@v8 -> actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8
• .github/workflows/dotnet.yaml: actions/upload-artifact@v7 -> actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7
• .github/workflows/dotnet.yaml: cachix/install-nix-action@v31 -> cachix/install-nix-action@8aa03977d8d733052d78f4e008a241fd1dbf36b3 # v31
• .github/workflows/flake_update.yaml: DeterminateSystems/nix-installer-action@main -> DeterminateSystems/nix-installer-action@00199f951aeb9404028a6e4b95ad42546f73296a # main
• .github/workflows/flake_update.yaml: actions/checkout@v6 -> actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
• .github/workflows/flake_update.yaml: actions/create-github-app-token@v3 -> actions/create-github-app-token@bcd2ba49218906704ab6c1aa796996da409d3eb1 # v3
• .github/workflows/flake_update.yaml: peter-evans/enable-pull-request-automerge@v3 -> peter-evans/enable-pull-request-automerge@a660677d5469627102a1c1e11409dd063606628d # v3

[smaug123-robocop]

⚠️ Code review unstable

Commit: 55a730c
Reason: OpenAI billing hard limit reached: OpenAI Batches API error: 400 Bad Request - {
"error": {
"message": "Billing hard limit has been reached",
"type": "invalid_request_error",
"param": null,
"code": "billing_hard_limit_reached"
}
}

Batch ID: (submission failed)

---

Robocop vbdfeeb67