[Fix] Add various missing Attack icons to Adversaries (#651)

Added missing attack icons to the following adversaries' respective attacks.

Conscript - Spears
Mortal Hunter - Tear at Flesh
Spectral Captain - Longbow
Vault Guardian Sentinel - Charged Mace

src/packs/adversaries/adversary_Conscript_99TqczuQipBmaB8i.json

@@ -60,6 +60,7 @@
     },
     "attack": {
       "name": "Spears",
+      "img": "icons/weapons/polearms/spear-flared-worn.webp",
       "range": "veryClose",
       "roll": {
         "bonus": 0,

src/packs/adversaries/adversary_Mortal_Hunter_mVV7a7KQAORoPMgZ.json

@@ -74,6 +74,7 @@
     "description": "<p>An undead figure wearing a heavy leather coat, with searching eyes and a casually cruel demeanor.</p>",
     "attack": {
       "name": "Tear at Flesh",
+      "img": "icons/skills/melee/strike-slashes-red.webp",
       "roll": {
         "bonus": 5,
         "type": "attack"

src/packs/adversaries/adversary_Spectral_Captain_65cSO3EQEh6ZH6Xk.json

@@ -74,6 +74,7 @@
     "motivesAndTactics": "Move through solid objects, rally troops, rehash old battles",
     "attack": {
       "name": "Longbow",
+      "img": "icons/weapons/bows/longbow-recurve-skull-brown.webp",
       "damage": {
         "parts": [
           {

src/packs/adversaries/adversary_Vault_Guardian_Sentinel_FVgYb28fhxlVcGwA.json

@@ -68,6 +68,7 @@
     "description": "<p>A dust-covered golden construct with boxy limbs and a huge mace for a hand.</p>",
     "attack": {
       "name": "Charged Mace",
+      "img": "icons/weapons/maces/shortmace-ornate-gold.webp",
       "range": "veryClose",
       "roll": {
         "bonus": 3,