fix(docs): Corrected typos in project documentation

[plan-do-break-fix]

Scope of changes restricted to docs.

[codecov]

Codecov Report

Merging #669 (e1c5c59) into master (5a70744) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #669   +/-   ##
=======================================
  Coverage   98.68%   98.68%           
=======================================
  Files          33       33           
  Lines         687      687           
  Branches      212      212           
=======================================
  Hits          678      678           
  Misses          5        5           
  Partials        4        4           

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[stale]

Thanks for your contribution to vue-meta! This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. If you would like this issue to remain open:

1. Verify that you can still reproduce the issue in the latest version of vue-meta
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   Issues that are labeled as pending will not be automatically marked as stale.

[glen-84]

LGTM

[stale]

Thanks for your contribution to vue-meta! This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. If you would like this issue to remain open:

1. Verify that you can still reproduce the issue in the latest version of vue-meta
2. Comment the steps to reproduce it
   Issues that are labeled as pending will not be automatically marked as stale.

[pimlie]

Thanks!