chore(deps): bump authlib from 1.6.8 to 1.6.11 in /agents/form #560

Job	Run time
mise setup	51s
mise check	59s
mise test	1m 9s
mise agentstack-sdk-py:test-all --python=${{ matrix.python }}	0s
mise microshift-vm:build:qemu	8s
mise agentstack-server:test:integration	0s
mise agentstack-server:test:e2e	-1s
mise agentstack-server:test:e2e-examples	-1s
	3m 5s

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