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.

CMakeLists.txt

@@ -312,7 +312,7 @@ set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${PROJECT_BINARY_DIR}/bin)
 # Enforce the search mode of non-required packages for better and shorter failure messages
 find_package(Boost REQUIRED context)
 find_package(enet MODULE)
-find_package(fmt 9 REQUIRED)
+find_package(fmt REQUIRED)
 if (CITRON_USE_LLVM_DEMANGLE)
     find_package(LLVM MODULE COMPONENTS Demangle)
 endif()
@@ -327,7 +327,7 @@ find_package(ZLIB REQUIRED)
 find_package(zstd REQUIRED)
 
 if (NOT CITRON_USE_EXTERNAL_VULKAN_HEADERS)
-    find_package(VulkanHeaders 1.4.304 REQUIRED)
+    find_package(VulkanHeaders 1.4.306 REQUIRED)
 endif()
 
 if (NOT CITRON_USE_EXTERNAL_VULKAN_UTILITY_LIBRARIES)