[chore] Change renovate datasource for manifest.yaml dependency updat…

…es (#398)

Signed-off-by: odubajDT <[email protected]>

renovate.json

@@ -45,7 +45,7 @@
       {
         "fileMatch": ["^manifest.yaml$"],
         "matchStrings": ["- gomod: (?<depName>(go\\.opentelemetry\\.io\/collector|github\\.com\/open-telemetry\/opentelemetry-collector-contrib|github\\.com\/dynatrace\/dynatrace-otel-collector)\/([A-Za-z0-9]+\/)*[A-Za-z0-9]+) (?<currentValue>v\\d+\\.\\d+\\.\\d+)\\n"],
-        "datasourceTemplate": "go"
+        "datasourceTemplate": "github-releases"
       }
   ]
 }