chore: the SSH aliases and CI's runner label keep the servers' names

The servers' names are no secret, so the settings that carry them stay
as they were, and nothing on a server or a laptop needs changing: CI
runs on `sahaquiel` again, the release uploads to `ramiel-fdroid`, and
deploys by hand go through `sahaquiel-deploy`. Prose still names a
server by the domain it serves, which says what a reader needs.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>

.forgejo/workflows/ci.yaml

@@ -14,7 +14,7 @@ on:
 
 jobs:
   check:
-    runs-on: instance
+    runs-on: sahaquiel
     timeout-minutes: 45
     env:
       # The Flutter the app is developed with; move it together with the local one.
@@ -143,7 +143,7 @@ jobs:
   deploy:
     needs: check
     if: github.ref == 'refs/heads/main'
-    runs-on: instance
+    runs-on: sahaquiel
     timeout-minutes: 30
     steps:
       # The key can run nothing but deploy/redeploy.sh, and only from that server itself.