Doc Fix: middleware chain order example

[AmirQadir]

In the chaining interceptor example, the recovery handler was the first element in the unary chain. It should have been last as per the recovery example in the codebase.

go-grpc-middleware/recovery/examples_test.go

Line 28 in b6d97fa

// Create a server. Recovery handlers should typically be last in the chain so that other middleware

go-grpc-middleware/recovery/examples_test.go

Line 29 in b6d97fa

// (e.g. logging) can operate on the recovered state instead of being directly affected by any panic

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[AmirQadir]

@googlebot I signed it!

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[AmirQadir]

@googlebot I signed it!

[johanbrandhorst]

LGTM

[xiaozhoz]

I intend to put it in the first one since it can recover unexpected panic from other custom middlewares. See #414 also.

I didn't get how it affects other middlewares if recovery is the first one. Could you please explain more?