docs(spec): point the open release task at v0.1.0

T091 is an unchecked task instructing whoever runs it to tag `v0.1.0-alpha`,
which is now the wrong tag. The phased plan below it (v0.1.0-alpha ->
v0.2.0-alpha -> v0.3.0-alpha, one per user story) is left as written: it is a
record of what was planned, not an instruction, and it was not followed.

Author: barbatos2011

specs/001-trond-cli-platform/tasks.md

@@ -231,7 +231,11 @@
 - [ ] T088 Run golangci-lint on entire codebase and fix all findings
 - [ ] T089 Run `trond config validate` against all example intent files to verify they pass
 - [ ] T090 Validate quickstart.md scenarios end-to-end
-- [ ] T091 Tag v0.1.0-alpha release and verify goreleaser + cosign pipeline
+- [ ] T091 Tag v0.1.0 release and verify goreleaser + cosign pipeline
+      (was `v0.1.0-alpha`; the phased alpha plan further down was never
+      followed — everything landed on develop untagged and ships as one
+      `v0.1.0`. `prerelease: auto` would also file any `-alpha` tag as a
+      pre-release, which `scripts/install.sh` does not resolve.)
 
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