docs(editorial): add missing period in 'Be a bridge' sectionUpdate editorial-style-guide.md

[0xjavid]

This PR adds a missing period at the end of the "Be a bridge" section in the Editorial Style Guide.

Why

• Improves grammatical consistency.
• Aligns the tone and formatting with other sections of the guide.
• Addresses feedback from Issue Add a period in the "Be a bridge" section #26 ("Add a period in the 'Be a bridge' section").

Changes

• Updated guides/editorial-style-guide.md to include a period at the end of the "Be a bridge" sentence.

✅ This is a minor documentation fix with no code or build impact.

[cb-heimdall]

🟡 Heimdall Review Status

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Reviews	🟡 0/1	Denominator calculation Show calculation 1 if user is bot 0 1 if user is external 0 2 if repo is sensitive 0 From .codeflow.yml 1 Additional review requirements Show calculation Max 0 0 From CODEOWNERS 0 Global minimum 0 Max 1 1 1 if commit is unverified 1 Sum 2