docs: minor grammar fixes

[G-Rath]

These were flagged by my IDE, so I figured I'd get them addressed

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 62.50000% with 3 lines in your changes missing coverage. Please review.

Project coverage is 64.84%. Comparing base (c5c2e74) to head (05670d6).
Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
...ternal/clients/clientimpl/osvmatcher/osvmatcher.go	0.00%	2 Missing ⚠️
.../clients/clientimpl/osvmatcher/cachedosvmatcher.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1743   +/-   ##
=======================================
  Coverage   64.84%   64.84%           
=======================================
  Files         157      157           
  Lines       15836    15836           
=======================================
  Hits        10269    10269           
  Misses       4893     4893           
  Partials      674      674           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.