docs: enable copy-to-clipboard on Report Builder LLM prompt and API base-URL blocks (#15216)

The Doks docs theme (clipboard.js) only adds a copy button to fenced code
blocks that Hugo wraps in <div class="highlight">, which requires the fence
to declare a language. Two Report Builder blocks used a bare ``` fence and
therefore rendered as plain <pre> with no copy button:

- PRO__report_builder_llm.md: the self-contained LLM prompt users are meant
  to copy wholesale into Claude/ChatGPT
- PRO__report_builder_api.md: the API base-URL example

Tagging both fences as ```text matches the working Dashboards LLM guide and
gives every command/prompt in the Report Builder docs a copy button.

Authored by T. Walker - DefectDojo

Author: skywalke34

docs/content/metrics_reports/reports/PRO__report_builder_api.md

@@ -22,7 +22,7 @@ export DD_IMPORTER_DOJO_API_TOKEN="YOUR_API_TOKEN"
 
 The base URL for all calls is your instance plus `/api/v2`:
 
-```
+```text
 https://[YOUR-INSTANCE].cloud.defectdojo.com/api/v2
 ```
 

docs/content/metrics_reports/reports/PRO__report_builder_llm.md

@@ -37,7 +37,7 @@ export DD_IMPORTER_DOJO_API_TOKEN=<paste-token-here>
 
 Copy the entire fenced block below and paste it into Claude, ChatGPT, or any other capable LLM. The prompt is self-contained — the model will ask you for your tenant URL, token environment variable, and report audiences, then walk you through discovery → design → create → verify → run → download.
 
-```
+```text
 You are helping me build, run, and download custom reports in DefectDojo Pro
 using its REST API and "Report Generator" (Themes / Blocks / Templates /
 Generated Reports).