chore: Add mikewrighton to github-merit-badger.yml. (#26860)

Add mikewrighton to github-merit-badger.yml as part of onboarding.

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.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,MrArnoldPalmer,iliapolo,otaviomacedo,madeline-k,kaizencc,comcalvi,corymhall,peterwoodworth,TheRealAmazonKendra,vinayak-kukreja,mrgrain,pahud,cgarvis,kellertk,HBobertz,sumupitchayan,SankyRed,udaypant,colifran,khushail,scanlonp,aws-cdk-automation,dependabot[bot],mergify[bot]]'
+          ignore-usernames: '[rix0rrr,MrArnoldPalmer,iliapolo,otaviomacedo,madeline-k,kaizencc,comcalvi,corymhall,peterwoodworth,TheRealAmazonKendra,vinayak-kukreja,mrgrain,pahud,cgarvis,kellertk,HBobertz,sumupitchayan,SankyRed,udaypant,colifran,khushail,scanlonp,mikewrighton,aws-cdk-automation,dependabot[bot],mergify[bot]]'