Reword error message

[anthony-c-martin]

Closes #11953

Microsoft Reviewers: Open in CodeFlow

[github-actions]

Test this change out locally with the following install scripts (Action run 6328748466)

VSCode

• Mac/Linux

  bash <(curl -Ls https://aka.ms/bicep/nightly-vsix.sh) --run-id 6328748466

• Windows

  iex "& { $(irm https://aka.ms/bicep/nightly-vsix.ps1) } -RunId 6328748466"

Azure CLI

• Mac/Linux

  bash <(curl -Ls https://aka.ms/bicep/nightly-cli.sh) --run-id 6328748466

• Windows

  iex "& { $(irm https://aka.ms/bicep/nightly-cli.ps1) } -RunId 6328748466"

[github-actions]

Test Results

     132 files  ±  0       132 suites  ±0   3h 29m 30s ⏱️ + 12m 9s
10 557 tests +  4  10 556 ✔️ +  3  0 💤 ±0  1 ❌ +1 
50 779 runs  +16  50 775 ✔️ +12  0 💤 ±0  4 ❌ +4 

For more details on these failures, see this check.

Results for commit ba3f120. ± Comparison against base commit 5dea3b2.

♻️ This comment has been updated with latest results.