doc: Corrections to retest-action doc

Fixing a broken link and some readability improvements.

Signed-off-by: karthik-us <ksubrahm@redhat.com>

actions/retest/README.md

@@ -1,15 +1,15 @@
 # retest-action
 
 This is a github action built using the golang and the [github
-api](github.com/google/go-github). The main idea behind this one is to retest
+api](https://github.com/google/go-github). The main idea behind this one is to retest
 the failed tests on the approved PR's to avoid burden on the
 maintainer's/author's to retest all the failed tests.
 
 * List the pull requests from the  github organization.
 * Check PR is open and have required approvals.
-* Check PR as the required label to continue to retest.
+* Check PR has the required label to continue to retest.
 * Pulls the failed test details.
 * Check failed test has reached the maximum limit.
-* If the limit has not reached the action will post the `retest` command on the
+* If the limit has not reached, the action will post the `retest` command on the
   PR with log location for further debugging.
-* If the limit has reached the Pull Request will be skipped.
+* If the limit has reached, the Pull Request will be skipped.