fix selection issues (#1515)

skyvern/forge/prompts/skyvern/custom-select.j2

@@ -2,7 +2,7 @@ You are performing a {{ "multi-level selection" if select_history else "selectio
 
 You can identify the matching element based on the following guidelines:
   1. Select the most suitable element based on the user goal, user details, and the context.
-  2. If no option is a perfect match, and there is a fallback option such as "Others" or "None of the above" in the DOM elements, you can consider it a match.
+  2. If none of the options perfectly match, and there is no search box for input, but there is a fallback option such as "Others" or "None of the above" in the DOM elements, you can consider it a match.
   3. If a field is required, do not leave it blank.
   4. If a field is required, do not select a placeholder value, such as "Please select", "-", or "Select...".
   5. Exclude loading indicators like "loading more results" as valid options.{% if select_history %}

skyvern/forge/prompts/skyvern/opened-dropdown-confirm.j2

@@ -2,7 +2,7 @@ There is a screenshot from a part of a web HTML page. Help me confirm if it is a
 
 An open dropdown menu can be defined as:
   - At least one option is visible in the screenshot.
-  - A calendar view or date picker could be considered as an open dropdown menu.
+  - A calendar view could be considered as an open dropdown menu. But DO NOT consider an calendar icon as the dropdown menu.
   - Do not consider it an open dropdown menu if the only visible option displays a message like "No results" or "No match".
   - Do not consider it an open dropdown menu if the only visible element displays a placeholder like "Please select", "-", or "Select...".