Reduce transcript banner drop shadow elevation

[lromero16]

Description

Fixes #PCDROID-398

Reduces the drop shadow on the "View Transcript" banner from 2.dp to 1.dp to make it less visually heavy, consistent with other small card elements in the app.

Testing Instructions

1. Open an episode that has a transcript available
2. Verify the "View Transcript" banner has a lighter, more subtle drop shadow

Screenshots or Screencast

Checklist

• If this is a user-facing change, I have added an entry in CHANGELOG.md
• Ensure the linter passes (./gradlew spotlessApply to automatically apply formatting/linting)
• I have considered whether it makes sense to add tests for my changes
• All strings that need to be localized are in modules/services/localization/src/main/res/values/strings.xml
• Any jetpack compose components I added or changed are covered by compose previews
• I have updated (or requested that someone edit) the spreadsheet to reflect any new or changed analytics.

I have tested any UI changes...

• with different themes
• with a landscape orientation
• with the device set to have a large display and font size
• for accessibility with TalkBack

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[geekygecko]

I believe the Compose shadow has improved in recent versions would it be possible to closer match the design?

Spec

Implementation