Remove the temporary deploy trigger

Reverts the branch entry added purely so act_runner would really
execute the deploy workflow's build job against the new hugo install
path. deploy.yml is back to `branches: [main]` and is now byte-identical
to main's copy: `git diff main HEAD -- .gitea/workflows/deploy.yml` is
empty.

The runner-verified commit 2a95023 is deliberately left in this branch's
history rather than rebased away, so a reviewer can confirm for
themselves that nothing functional changed between what the runner
actually ran and what is being merged:

    git diff 2a95023 HEAD -- .gitea/workflows/deploy.yml

Only the trigger entry and its comment differ.

.gitea/workflows/deploy.yml

@@ -4,13 +4,6 @@ on:
     push:
         branches:
             - main
-            # TEMPORARY - removed before merge. This branch changes how
-            # script/bootstrap installs hugo, which is the production
-            # deploy path, and script/cibuild cannot cover that: docker
-            # build runs RUN under /bin/sh with no Actions runtime. The
-            # deploy job's `if: github.ref_name == 'main'` guard below
-            # keeps branch runs away from Cloudflare.
-            - 26-hugo-deliberate-version
 
 jobs:
     build: