Rename CONTRIBUTOR.md to CONTRIBUTING.md

Use the conventional name so GitHub auto-links it in the PR and issue
UI. Update the references in deploy.sh and release.yml.

Author: RaoulSchaffranek

.github/workflows/release.yml

@@ -41,7 +41,7 @@ jobs:
           fetch-depth: 0
 
       # The build-and-publish logic lives in scripts/deploy.sh so CI and manual
-      # deployments stay in sync (single source of truth). See CONTRIBUTOR.md.
+      # deployments stay in sync (single source of truth). See CONTRIBUTING.md.
       - name: 'Build and publish komet-node to both Nix caches'
         shell: bash
         env:
@@ -75,7 +75,7 @@ jobs:
           fetch-depth: 0
 
       # Build, smoke-test, and push logic lives in scripts/deploy.sh so CI and
-      # manual deployments stay in sync (single source of truth). See CONTRIBUTOR.md.
+      # manual deployments stay in sync (single source of truth). See CONTRIBUTING.md.
       - name: 'Build, test, and push Docker image to Docker Hub'
         env:
           DOCKERHUB_PASSWORD: ${{ secrets.DOCKERHUB_PASSWORD }}

CONTRIBUTOR.md CONTRIBUTING.mdCONTRIBUTOR.md renamed to CONTRIBUTING.md

@@ -10,7 +10,7 @@ set -euo pipefail
 # This is the single source of truth for the deployment steps that the Release
 # workflow (.github/workflows/release.yml) performs. The workflow calls the
 # subcommands below, and you can run the exact same steps by hand when CI is
-# unavailable. See CONTRIBUTOR.md ("Deploying a release") for the runbook.
+# unavailable. See CONTRIBUTING.md ("Deploying a release") for the runbook.
 #
 # Subcommands:
 #   nix-cache   Build komet-node and push it to both Nix caches (the