deps: update mcp requirement from <1.28.0,>=1.23.0 to >=1.23.0,<2.1.0 in /authplane-mcp in the pip-all group across 1 directory

deps: update mcp requirement from <1.28.0,>=1.23.0 to >=1.23.0,<2.1.0 in /authplane-mcp in the pip-all group across 1 directory #31