Update clang-format patch-diff path

After 37b6e68c I forgot to update this
path.
13 jobs from master in 12 minutes and 3 seconds (queued for 2 seconds)
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  Prepare
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prepare:activemqcpp

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  Build
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build:webui

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build:worker

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  Test
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test:webui

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test:worker

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passed #228896
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test:worker:clang-format

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  Docker Build
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docker-build:client

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docker-build:server

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docker-build:worker

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  Docker Deploy
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docker-deploy:client:latest

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docker-deploy:server:latest

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docker-deploy:worker:latest

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  Notify
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notify:altvm

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