feat: re-merge (#2)

Reviewed-on: https://codeberg.org/nhcarrigan/tingle-bot/pulls/2
Co-authored-by: Naomi Carrigan <commits@nhcarrigan.com>
Co-committed-by: Naomi Carrigan <commits@nhcarrigan.com>

src/modules/images/getOverlayImage.ts

@@ -15,7 +15,7 @@ import type { SpecialName }
  * @returns The file path to the overlay, or null if there is no overlay.
  */
 export const getOverlayImage = (
-  name: SpecialName | PrecipitationName | null,
+  name: SpecialName | PrecipitationName,
 ): string | null => {
   let fileName: string | null = null;
   switch (name) {