Update fetch_sources to vulkan 1.3

Points to public github

Components: Framework

Change-Id: I8638dbca5a38823e836922794d3ec47c3892368c
diff --git a/external/fetch_sources.py b/external/fetch_sources.py
index 61ab51b..6a3b244 100644
--- a/external/fetch_sources.py
+++ b/external/fetch_sources.py
@@ -315,30 +315,30 @@
 		"e7b5f0aa5b1b0eadc63a1c624c0ca7f5af133aa857d6a4271b0ef3d0bdb6868e",
 		"renderdoc"),
 	GitRepo(
-		"https://gitlab.khronos.org/spirv/spirv-tools.git",
-		"git@gitlab.khronos.org:spirv/spirv-tools.git",
-		"f0b6520721c7ab0d4e64c885d9bcbaa21641cbc9",
+		"https://github.com/KhronosGroup/SPIRV-Tools.git",
+		None,
+		"a73e724359a274d7cf4f4248eba5be1e7764fbfd",
 		"spirv-tools"),
 	GitRepo(
-		"https://gitlab.khronos.org/GLSL/glslang.git",
-		"git@gitlab.khronos.org:GLSL/glslang.git",
-		"0d80fdd4d327ee38cabdcc2978b7b61da2359a30",
+		"https://github.com/KhronosGroup/glslang.git",
+		None,
+		"c34bb3b6c55f6ab084124ad964be95a699700d34",
 		"glslang",
 		removeTags = ["master-tot"]),
 	GitRepo(
-		"https://gitlab.khronos.org/spirv/SPIRV-Headers.git",
-		"git@gitlab.khronos.org:spirv/SPIRV-Headers.git",
-		"7445cca32fa418a40dbc8b433734a1d3079200ac",
+		"https://github.com/KhronosGroup/SPIRV-Headers.git",
+		None,
+		"b42ba6d92faf6b4938e6f22ddd186dbdacc98d78",
 		"spirv-headers"),
 	GitRepo(
-		"https://gitlab.khronos.org/vulkan/vulkan.git",
-		"git@gitlab.khronos.org:vulkan/vulkan.git",
-		"35f668085338149643e03b48b1d7aa22c704cf3a",
+		"https://github.com/KhronosGroup/Vulkan-Docs.git",
+		None,
+		"ee155139142a2a71b56238419bf0a6859f7b0a93",
 		"vulkan-docs"),
 	GitRepo(
-		"https://gitlab.khronos.org/spirv/amber.git",
-		"git@gitlab.khronos.org:spirv/amber.git",
-		"58a246b645b1e6ec228f715c9db94cd9f3c0c2be",
+		"https://github.com/google/amber.git",
+		None,
+		"615ab4863f7d2e31d3037d0c6a0f641fd6fc0d07",
 		"amber"),
 ]