Update dependency to-be-continuous/docker to v6.4.0

This MR contains the following updates:

Package	Type	Update	Change
to-be-continuous/docker	repository	minor	6.2.1 -> 6.4.0

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Release Notes

to-be-continuous/docker (to-be-continuous/docker)

v6.4.0

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Features

• modular workflow rules (d9d206b)

6.3.1 (2025-08-08)

Bug Fixes

• cache key for trivy (4a35f1f)

v6.4

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Features

• modular workflow rules (d9d206b)

6.3.1 (2025-08-08)

Bug Fixes

• cache key for trivy (4a35f1f)

v6.3.1

Compare Source

Features

• modular workflow rules (d9d206b)

6.3.1 (2025-08-08)

Bug Fixes

• cache key for trivy (4a35f1f)

v6.3.0

Compare Source

Features

• modular workflow rules (d9d206b)

6.3.1 (2025-08-08)

Bug Fixes

• cache key for trivy (4a35f1f)

v6.3

Compare Source

Features

• modular workflow rules (d9d206b)

6.3.1 (2025-08-08)

Bug Fixes

• cache key for trivy (4a35f1f)

v6.2.2

Compare Source

Features

• configurable @​url@​ timeout (950e3df)

6.2.2 (2025-07-05)

Bug Fixes

• fix unscope_variables (e4deed6)

6.2.1 (2025-06-20)

Bug Fixes

• buildah: use buildah specific image (0944c88)
• skopeo: use skopeo specific image (da53ce5)

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