Bazel Docs: Fix syntax errors in 7.6.1 docs.

Authored by Gemini CLI:

<details>

<summary>Prompt</summary>

```
You're an experienced tech writer.
Your task is to fix all remaining syntax errors in .mdx files in the current directory.
You can find syntax errors by running "mint validate".

Rules:
- Do not insert blank lines
- Do not change the indentation of lines
- Do not introduce trailing whitespaces
- Do not delete any of the text
```

</details>

<details>

<summary>Output</summary>

```
  Summary of Changes:
   - concepts/dependencies.mdx: Resolved issues where indented <pre> tags
     and multi-line <td> content were misidentified as code blocks. I also
     escaped import keywords that the MDX parser mistook for JavaScript
     imports and reformatted recommendation blocks to single lines.
   - docs/cc-toolchain-config-reference.mdx: Corrected several
     table-related errors by making <col> tags self-closing and joining
     <td> tags with their content onto single lines. I also escaped
     literal angle bracket placeholders like <inc0>.
   - docs/user-manual.mdx & query/guide.mdx: Fixed <pre> tag parsing
     errors by moving their content to new lines, ensuring they are
     recognized as block-level elements.
   - reference/command-line-reference.mdx: Escaped numerous literal angle
     bracket placeholders (e.g., <path>, <value>, <float>) and curly
     braces that were being misinterpreted as unclosed HTML tags or MDX
     expressions.
   - rules/lib/repo/local.mdx: Fixed unclosed and improperly nested <p>
     tags by reformatting them onto their own lines.
  All modifications were performed without inserting blank lines,
  introducing trailing whitespaces, or deleting any descriptive text. The
  mint validate command now reports success build validation passed.
```

</details>

PiperOrigin-RevId: 888262182