chore: add new team member 9pace to github-merit-badger (#35569)

### Issue # (if applicable)

Closes #<issue number here>.

### Reason for this change

Adding new team member's GitHub account

### Description of changes

Added my github username to workflows github-merit-badger config

### Checklist
- [x] My code adheres to the [CONTRIBUTING GUIDE](https://github.com/aws/aws-cdk/blob/main/CONTRIBUTING.md) and [DESIGN GUIDELINES](https://github.com/aws/aws-cdk/blob/main/docs/DESIGN_GUIDELINES.md)

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*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*

Author: 9pace

.github/workflows/github-merit-badger.yml

@@ -17,4 +17,4 @@ jobs:
           badges: '[beginning-contributor,repeat-contributor,valued-contributor,admired-contributor,star-contributor,distinguished-contributor]'
           thresholds: '[0,3,6,13,25,50]'
           badge-type: 'achievement'
-          ignore-usernames: '[rix0rrr,iliapolo,otaviomacedo,kaizencc,TheRealAmazonKendra,mrgrain,pahud,kellertk,ashishdhingra,khushail,moelasmar,paulhcsun,GavinZZ,xazhao,gracelu0,shikha372,godwingrs22,bergjaak,IanKonlog,Leo10Gama,samson-keung,scorbiere,jiayiwang7,saiyush,5d,iankhou,QuantumNeuralCoder,SimonCMoore,Y-JayKim,ykethan,astiwana,maharajhaider,aws-cdk-automation,dependabot[bot],mergify[bot],aemada-aws,ozelalisen,abogical,alinko-aws,vishaalmehrishi,alvazjor,kumsmrit,kumvprat,leonmk-aws,matboros,gasolima,abidhasan-aws]'
+          ignore-usernames: '[rix0rrr,iliapolo,otaviomacedo,kaizencc,TheRealAmazonKendra,mrgrain,pahud,kellertk,ashishdhingra,khushail,moelasmar,paulhcsun,GavinZZ,xazhao,gracelu0,shikha372,godwingrs22,bergjaak,IanKonlog,Leo10Gama,samson-keung,scorbiere,jiayiwang7,saiyush,5d,iankhou,QuantumNeuralCoder,SimonCMoore,Y-JayKim,ykethan,astiwana,maharajhaider,aws-cdk-automation,dependabot[bot],mergify[bot],aemada-aws,ozelalisen,abogical,alinko-aws,vishaalmehrishi,alvazjor,kumsmrit,kumvprat,leonmk-aws,matboros,gasolima,abidhasan-aws,9pace]'