Suppress dependentbot.yml under otel

Author: heyams

.config/CredScanSuppressions.json

@@ -5,7 +5,8 @@
       "file": [
         "C:\\source\\otel\\testing-common\\src\\misc\\README.md",
         "C:\\source\\otel\\testing-common\\src\\misc\\testing-keystore.p12",
-        "C:\\source\\otel\\benchmark-overhead\\src\\test\\java\\io\\opentelemetry\\containers\\PostgresContainer.java"
+        "C:\\source\\otel\\benchmark-overhead\\src\\test\\java\\io\\opentelemetry\\containers\\PostgresContainer.java",
+        "C:\\source\\otel\\.github\\dependabot.yml"
       ],
       "_justification": "The secret is used only for testing."
     }