docs: add missing semicolons and colons in code examples

[gabrielrbarbosa]

Description

Prevent syntax errors and inaccuracies when running code examples from current documentation.

After changing to new routes and binds methods in v6, I've found a few incorrect syntax in docs.

Checklist

• [✓] The title of my PR starts with a [Conventional Commit] prefix (docs:).
• [✓] I have read the [Contributor Guide] and followed the process outlined for submitting PRs.
• I have updated/added tests for ALL new/updated/fixed functionality.
• I have updated/added relevant documentation in docs and added dartdoc comments with ///.
• I have updated/added relevant examples in examples.

Breaking Change

• Yes, this is a breaking change.
• [✓] No, this is not a breaking change.

Related Issues

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (79e97b2) 100.00% compared to head (e616439) 100.00%.
Report is 9 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##            master      #881    +/-   ##
==========================================
  Coverage   100.00%   100.00%            
==========================================
  Files           40         8    -32     
  Lines          929       201   -728     
==========================================
- Hits           929       201   -728     

see 32 files with indirect coverage changes

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