fix(release): remove tag_prefixes — it filtered all v* tags out

Setting tag_prefixes: ['bot-api-'] caused semver-generator to ignore
every tag without that prefix, including the v0.x.y / v1.x.y release
tags. With no parseable existing version, it restarted numbering at
zero and produced v0.0.4 as a 'next' version after v1.1.1 — a
regression Go modules would never serve.

The bot-api-vX.Y marker is set by a separate workflow step; semver-
generator does not need to see it.

.semver.yaml

@@ -19,11 +19,12 @@ blacklist:
   - "Merge remote-tracking branch"
   - "go mod tidy"
 
-# Strip the auto-generated bot-api-vX.Y tag prefix when scanning existing
-# tags — those are markers that point at library releases, not version
-# sources themselves.
-tag_prefixes:
-  - "bot-api-"
+# NOTE: do not configure tag_prefixes here. The action's behaviour with
+# that option present is to FILTER tags down to those matching the
+# listed prefixes — meaning v0.x.y / v1.x.y tags get ignored and version
+# numbering restarts from zero. The bot-api-vX.Y tag is created by a
+# separate workflow step and does not need to participate in version
+# selection.
 
 wording:
   patch: