Update dependency grpc to v1.24.11

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
grpc (source)	1.24.9 → 1.24.11

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Release Notes

grpc/grpc-node (grpc)

v1.24.11: Node gRPC 1.24.11

Compare Source

• SECURITY FIX: Fix a double free bug in server-side TCP error handling code (grpc/grpc#26750 picked up in #​1861). This bug was discovered by Brad Buckingham and Alex Skwarczynski.
• Update the ServiceDefinition TypeScript type for compatibility with @grpc/grpc-js (#​1860)

v1.24.10: Node gRPC 1.24.10

• Make callback function check properly handle async functions (#​1786 contributed by @​amje)

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