ci: pin reviewed specification candidate

Author: TonisOrmisson

.github/workflows/ci.yml

@@ -20,7 +20,7 @@ jobs:
         uses: actions/checkout@v7
         with: &specification-checkout
           repository: OpenStatSpec/specification
-          ref: e707636180c3aafd64cc60aa274549212d2c05a7
+          ref: 5b62bce1d2f4d719ac6ca42d73f07e7a127c7093
           path: openstatspec-specification
       - name: Checkout required SPSS engine
         uses: actions/checkout@v7