add changeset (#1235)

Author: Tofel

lib/.changeset/v1.50.12.md

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+- Fixes to common release pipeline that cover a case, when only 1 tag is present
+- Fixed low RPS bug in WASP
+- Updated `slack-go` library to latest version, which supports new file upload API
+- Enabled user indexes collector in Postgres exporter
+- Removed unnecessary replaces and exclusion from Havoc's `go.mod`
+- Bumped k3d and Helm to newer versions