fix: fix multiapp tasks (#229)

Co-authored-by: adlsdztony <zzl0712@connect.hku.hk>

evaluation_examples/examples/multi_apps/48d05431-6cd5-4e76-82eb-12b60d823f7d.json

@@ -1,7 +1,7 @@
 {
   "id": "48d05431-6cd5-4e76-82eb-12b60d823f7d",
   "snapshot": "os",
-  "instruction": "When I ran \"conda install datasets\" in terminal, I got \"conda: command not found\". Could you help me solve it?",
+  "instruction": "When I ran \"conda install datasets\" in terminal, I got \"conda: command not found\". Could you help me solve it so that I can use conda command right away?",
   "source": "authors",
   "config": [
     {
@@ -45,17 +45,18 @@
     "os",
     "chrome"
   ],
+  
   "evaluator": {
-    "func": "is_in_list",
+    "func": "exact_match",
     "result": {
       "type": "vm_command_line",
-      "command": "conda list",
+      "command": "grep -q 'conda initialize' ~/.bashrc && echo 1 || echo 0",
       "shell": true
     },
     "expected": {
       "type": "rule",
       "rules": {
-        "expected": "packages in environment at"
+        "expected": "1\n"
       }
     }
   },