Fix command to run spellcheck (#3753)

The command wasn't correct.

Author: KristjanESPERANTO

.github/workflows/spellcheck.yaml

@@ -28,4 +28,4 @@ jobs:
         run: |
           npm run install-mm:dev
       - name: Run Spellcheck
-        run: npm run test:spellcheck
+        run: npm run test:spelling

CHANGELOG.md

@@ -50,6 +50,7 @@ planned for 2025-04-01
 - [calendar] Fix NewYork event processed on system in Central timezone shows wrong time #3701
 - [weather/yr] The Yr weather provider is now able to recover from bad API responses instead of freezing (#3296)
 - [compliments] Fix evening events being shown during the day (#3727)
+- [workflow] Fix command to run spellcheck
 
 ## [2.30.0] - 2025-01-01