build(deps): bump mcp from 1.28.0 to 1.28.1 in /ai/slackbot-mcp-client/slack-identity (#89)

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

ai/slackbot-mcp-client/slack-identity/requirements.txt

@@ -1,5 +1,5 @@
 httpx2==2.5.0
-mcp==1.28.0
+mcp==1.28.1
 mypy==2.1.0
 pytest==9.1.1
 ruff==0.15.20