missing line break after summary tag for synonyms

[lowlydba]

Adds missing line break in the Synonym section

Description

Issue: fixes #184

How Has This Been Tested?

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)

Checklist:

• I have updated the Version number of any scripts modified.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

[codecov]

Codecov Report

Merging #186 (8173263) into development (c85d37c) will not change coverage.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##           development     #186   +/-   ##
============================================
  Coverage        98.56%   98.56%           
============================================
  Files                4        4           
  Lines             2781     2781           
============================================
  Hits              2741     2741           
  Misses              40       40           

Impacted Files	Coverage Δ
appveyor/sqlcover/[dbo].[sp_doc]	99.49% <100.00%> (ø)

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