Fix lint issues in report.glmmTMB.R by renaming conflicting variable

[Copilot]

This PR fixes object_overwrite_linter warnings in report.glmmTMB.R by renaming the local text variable to random_text to avoid conflicts with the text() function from the graphics package.

Issue:
The report_random.glmmTMB() function was using a local variable named text which conflicts with graphics::text(), causing lint warnings:

# Before - caused object_overwrite_linter warnings
text <- random_terms
text <- paste0("The model included ", text, " as random effect")
text <- ifelse(length(random_terms) > 1, paste0(text, "s"), text)

Solution:
Renamed the variable to random_text for better clarity and to avoid namespace conflicts:

# After - no lint warnings, more descriptive
random_text <- random_terms
random_text <- paste0("The model included ", random_text, " as random effect")
random_text <- ifelse(length(random_terms) > 1, paste0(random_text, "s"), random_text)

This change maintains complete backward compatibility while following the naming patterns used elsewhere in the codebase (e.g., other_text, result_text, parameter_text).

Fixes #562.

---

💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more Copilot coding agent tips in the docs.