chore: Do not update opentelemetry (#18254)

This disables the creation of dependabot updates for opentelemetry.
Based on the image below there was not a real benefit of having this,
except noise.

<img width="984" height="820" alt="Screenshot 2025-11-19 at 11 21 02"
src="https://github.com/user-attachments/assets/6849c6e2-16d2-4cfd-874e-cd3241c70deb"
/>

Author: JPeer264

.github/dependabot.yml

@@ -14,9 +14,15 @@ updates:
       interval: 'weekly'
     allow:
       - dependency-name: '@sentry/*'
-      - dependency-name: '@opentelemetry/*'
-      - dependency-name: '@prisma/instrumentation'
       - dependency-name: '@playwright/test'
+      - dependency-name: '@opentelemetry/*'
+    ignore:
+      - dependency-name: '@opentelemetry/instrumentation'
+      - dependency-name: '@opentelemetry/instrumentation-*'
+    groups:
+      opentelemetry:
+        patterns:
+          - '@opentelemetry/*'
     versioning-strategy: increase
     commit-message:
       prefix: feat