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/Vulkan-Utility-Libraries b/externals/Vulkan-Utility-Libraries
-Subproject 7b23ba7a5f86936a8d783baf64a77c38977d689
+Subproject 8ec84823afa46cd054c8b094269eab958e07801