ci: update pre-commit configuration for GitLab CI

Add GOPRIVATE environment variable for private repos and 
create a .netrc file in the before_script to enable 
authentication with GitLab. These changes ensure that 
private repositories can be accessed during the CI 
pipeline, improving the build process.

Pre-Commit-Go.gitlab-ci.yml

@@ -3,11 +3,14 @@ run-pre-commit:
   image: unbound/pre-commit@sha256:596abf501d5ac878534b76f19d19ec5c952f1f362ad92d611172072ef5d483d5
   variables:
     PRE_COMMIT_HOME: ${CI_PROJECT_DIR}/.cache/pre-commit
+    GOPRIVATE: gitlab.com/unboundsoftware
   cache:
   - key:
       files:
       - .pre-commit-config.yaml
     paths:
     - ${PRE_COMMIT_HOME}
+  before_script:
+  - echo -e "machine gitlab.com\nlogin gitlab-ci-token\npassword ${CI_JOB_TOKEN}" > ~/.netrc
   script:
   - pre-commit run --all-files