Changed resistances and hitpoints for Tentacle of the Deep

Based on forum discussion: https://forums.wesnoth.org/viewtopic.php?t=46922

changelog

@@ -49,6 +49,8 @@ Version 1.13.11:
      CPU usage in fullscreen windows such as MP lobby by about 85 %.
    * Miscellaneous low-level optimizations in game rendering code, improving
      performance ingame by up to 50 %.
+ * Units:
+   * Changed resistances and hitpoints for Tentacle of the Deep.
  * User Interface:
    * Removed broken Unit Box and Widescreen themes.
    * Fixed a bug that partially prevented movement feedback announce messages

data/core/units/monsters/Tentacle.cfg

@@ -6,10 +6,13 @@
     # The ~O(0) trick is used here to allow the base tentacle image to get used in contexts where IPFs are not supported
     image="units/monsters/deep-tentacle.png~O(0)~BLIT(halo/ripples/ripple10.png~CROP(0,0,72,53),0,19)~BLIT(units/monsters/deep-tentacle.png)"
     profile="portraits/monsters/deep-tentacle.png"
-    hitpoints=28
+    hitpoints=25
     movement_type=float
     [resistance]
-        arcane=130
+        arcane=100
+        blade=120
+        cold=40
+        impact=70
     [/resistance]
     movement=2
     experience=50