Comments in Markdown file shown in search results snippet

**DocFX Version Used**:
2.38

**Template used**: (`default` or `statictoc` or contain custom template)
Custom

**Steps to Reproduce**:

1. Comment out text in Markdown file:
2. Build and publish
3. Open article in built website - no comments are shown:
4. Search for article - comments are shown in snippet):
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**Expected Behavior**:
That commented-out text is not shown in search results preview snippet
**Actual Behavior**:
Commented-out text is shown in search results preview snippet