media-libs/VulkanMemoryAllocator: fix the documentation directory name

Closes: https://bugs.gentoo.org/975303
Signed-off-by: Pavel Sobolev <contact@paveloom.dev>

media-libs/VulkanMemoryAllocator/VulkanMemoryAllocator-3.3.0.ebuild

@@ -18,6 +18,12 @@ BDEPEND="
 	doc? ( app-text/doxygen )
 "
 
+src_prepare() {
+	sed -i "s|doc/VulkanMemoryAllocator|doc/${PF}|" CMakeLists.txt
+
+	cmake_src_prepare
+}
+
 src_configure() {
 	local mycmakeargs=(
 		-DVMA_BUILD_DOCUMENTATION=$(usex doc)