Update README.md

Author: oscgonfer

docs/Air/SCK2.3/SCK2.3_SEN5X/3D_printed_frog_box/README.md

@@ -8,7 +8,7 @@ field:
   - air
 grade: basic
 feature_img: /assets/images/2.3/SCKit_23.png
-excerpt: SCK2.3 basic enclosure.
+excerpt: SCK2.3 basic enclosure
 ---
 
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