Update coding-interview-rubrics.md

Added missing : and missing .

apps/website/contents/coding-interview-rubrics.md

@@ -144,7 +144,7 @@ Testing signals
 | Strong hire | Demonstrated testing signals effortlessly. |
 | Leaning hire | Had some difficulty demonstrating testing signals, such as not being able to identify all the relevant corner cases. |
 | Leaning no hire | Conducted testing but did not handle corner cases. Not able to identify or correct bugs in code. |
-| Strong no hire | Did not even test code against typical cases. Did not spot glaring bugs in the code and announced they are done |
+| Strong no hire | Did not even test code against typical cases. Did not spot glaring bugs in the code and announced they are done. |
 
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