Core: added instructions to install xxhash and volk

TheMostDiligent · TheMostDiligent · commit 80b4e64b886e · 2025-06-14T14:10:19.000-07:00
diff --git a/DiligentCore b/DiligentCore
@@ -1 +1 @@
-Subproject commit ae151ac6873a8252e3f80a36dd0e8226d4061a71
+Subproject commit 699abfcdf1a0c47409c594304fa765bb98d35917
