docs: use variabilized GitLab server FQDN in CI/CD component reference URLs

README.md

@@ -14,7 +14,7 @@ Add the following to your `.gitlab-ci.yml`:
 ```yaml
 include:
   # 1: include the component
-  - component: gitlab.com/to-be-continuous/python/gitlab-ci-python@7.0.2
+  - component: $CI_SERVER_FQDN/to-be-continuous/python/gitlab-ci-python@7.0.2
     # 2: set/override component inputs
     inputs:
       image: registry.hub.docker.com/library/python:3.12-slim
@@ -519,9 +519,9 @@ With:
 ```yaml
 include:
   # main component
-  - component: gitlab.com/to-be-continuous/python/gitlab-ci-python@7.0.2
+  - component: $CI_SERVER_FQDN/to-be-continuous/python/gitlab-ci-python@7.0.2
   # Vault variant
-  - component: gitlab.com/to-be-continuous/python/gitlab-ci-python-vault@7.0.2
+  - component: $CI_SERVER_FQDN/to-be-continuous/python/gitlab-ci-python-vault@7.0.2
     inputs:
       vault-base-url: "https://vault.acme.host/v1"
       # audience claim for JWT
@@ -561,13 +561,13 @@ The variant requires the additional configuration parameters:
 
 ```yaml
 include:
-  - component: gitlab.com/to-be-continuous/python/gitlab-ci-python@7.0.2
+  - component: $CI_SERVER_FQDN/to-be-continuous/python/gitlab-ci-python@7.0.2
     # 2: set/override component inputs
     inputs:
       image: registry.hub.docker.com/library/python:3.12-slim
       pytest-enabled: true
 
-  - component: gitlab.com/to-be-continuous/python/gitlab-ci-python-gcp@7.0.2
+  - component: $CI_SERVER_FQDN/to-be-continuous/python/gitlab-ci-python-gcp@7.0.2
     inputs:
       # common OIDC config for non-prod envs
       gcp-oidc-provider: "projects/<gcp_nonprod_proj_id>/locations/global/workloadIdentityPools/<pool_id>/providers/<provider_id>"