Add note on custom proc in sqlserver.yaml [skip ci]
Add note on custom proc in sqlserver.yaml [skip ci]

DataDog/integrations-core,serverdensity/sd-agent-core-plugins,serverdensity/sd-agent-core-plugins,s-maj/integrations-core,DataDog/integrations-core,s-maj/integrations-core,DataDog/integrations-core,serverdensity/sd-agent-core-plugins,s-maj/integrations-core,s-maj/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,serverdensity/sd-agent-core-plugins,DataDog/integrations-core,DataDog/integrations-core,s-maj/integrations-core,serverdensity/sd-agent-core-plugins,DataDog/integrations-core,DataDog/integrations-core