deps: Update Vulkan dependencies and remove fmt version constraint

- Update Vulkan-Headers to e43027a (1.4.306)
- Update Vulkan-Utility-Libraries to 8ec8482
- Update vcpkg to 2b8927f
- Remove version constraint for fmt package requirement
- Update VulkanHeaders version requirement to 1.4.306

This updates several external dependencies to their latest versions and
removes the specific version requirement for fmt while maintaining the
REQUIRED flag. The Vulkan-Headers version requirement is updated to match
the new submodule version.

1 files changed, 0 insertions, 0 deletions

diff --git a/externals/vcpkg b/externals/vcpkg
-Subproject cf035d9916a0a23042b41fcae7ee0386d245af0
+Subproject 2b8927fe3703f1a92227303e1dbed5d0c0d3471