skillcalc: update soul & blood rune xp

this change accounts for the 2.5 xp received by crafting a dark
essence block from a dense essence block, the 2.5 exp is then broken
into 0.625 xp per rune from the dark essence fragments

runelite-client/src/main/resources/net/runelite/client/plugins/skillcalculator/skill_runecraft.json

@@ -184,13 +184,13 @@
       "level": 77,
       "icon": 565,
       "name": "Blood Rune",
-      "xp": 23.8
+      "xp": 24.425
     },
     {
       "level": 90,
       "icon": 566,
       "name": "Soul Rune",
-      "xp": 29.7
+      "xp": 30.325
     },
     {
       "level": 95,