Always build the docs website

If we trigger a deploy, then we want the deploy to actually run.

I am assuming that this was in place when there was a single GitHub
Actions workflow that would trigger this all the time, even when nothing
changed in `docs/**`. Since https://github.com/dagger/dagger/pull/1498,
we no longer have this problem.

After merging https://github.com/dagger/dagger/pull/1591, I was caught
by this behaviour which to me seemed surprising. This change should make
docs deploy via Netlify behave in a more predictable way.

Signed-off-by: Gerhard Lazu <gerhard@lazu.co.uk>

website/netlify.toml

@@ -4,18 +4,8 @@
   environment = { NODE_VERSION = "16.13.1" }
 
 [context.production]
-  # Do not build the site if there's no site-related changes since the last
-  # commit.
-  # This assumes PRs to `main` only contain merge commits, so it's safe to
-  # compare the current commit to the previous.
-  # We can't use `$CACHED_COMMIT_REF` because that points to the PR preview
-  # that was built before merging.
-  ignore = "git diff --quiet HEAD^ HEAD -- . ../docs/"
 
 [context.deploy-preview]
-  # Do not build the site if there's no site-related changes since the last
-  # deploy.
-  ignore = "git diff --quiet $COMMIT_REF $CACHED_COMMIT_REF -- ./ ../docs/"
   command = "yarn build:withoutAuth"
 
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