Update test matrix with 8.15.1-3

Author: dimuon

.github/workflows/test.yml

@@ -124,6 +124,9 @@ jobs:
           - '8.13.4'
           - '8.14.3'
           - '8.15.0'
+          - '8.15.1'
+          - '8.15.2'
+          - '8.15.3'
     steps:
       - uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871 # v4
       - uses: actions/setup-go@0a12ed9d6a96ab950c8f026ed9f722fe0da7ef32 # v5