build(deps): bump bouncycastle to 1.76

[andrewazores]

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See https://github.com/cryostatio/cryostat/pull/1905

Description of the change:

This change allows an environment variable to be configured so that...

Motivation for the change:

This change is helpful because users may want to...

How to manually test:

1. Run CRYOSTAT_IMAGE=quay.io... sh smoketest.sh...
2. ...

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Build Error! No Linked Issue found. Please link an issue or mention it in the body using #<issue_id>

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[andrewazores]

/build_test

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[github-actions]

ARCH	IMAGE
amd64	ghcr.io/cryostatio/cryostat:pr-1906-754ea0aec2b711c6c239c108e7f77531eb24744e-linux-amd64
arm64	ghcr.io/cryostatio/cryostat:pr-1906-754ea0aec2b711c6c239c108e7f77531eb24744e-linux-arm64

To run smoketest:

# amd64
CRYOSTAT_IMAGE=ghcr.io/cryostatio/cryostat:pr-1906-754ea0aec2b711c6c239c108e7f77531eb24744e-linux-amd64 sh smoketest.sh

# or arm64
CRYOSTAT_IMAGE=ghcr.io/cryostatio/cryostat:pr-1906-754ea0aec2b711c6c239c108e7f77531eb24744e-linux-arm64 sh smoketest.sh

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/build_test completed successfully ✅.
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