Make ad CTA bold with larger click target #5812

Job	Run time
build-and-check	2m 53s
test-integration-packages/billing	1m 5s
test-integration-packages/internal	1m 0s
test-integration-web	48s
test-integration-common	36s
test-integration-cli	43s
test-integration-packages/agent-runtime	45s
test-.agents	41s
test-common	43s
test-cli	1m 13s
test-integration-sdk	43s
test-packages/agent-runtime	46s
test-packages/billing	46s
test-packages/internal	47s
test-sdk	43s
test-web	43s
	14m 55s

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