Update CONTRIBUTING.md

Author: spavlusieva

CONTRIBUTING.md

@@ -13,7 +13,7 @@ vulnerability, do not raise a GitHub issue and follow the instructions in our
 ## Contributing code
 
 We welcome your code contributions. Before submitting code via a pull request,
-you will need to haved signed the [Oracle Contributor Agreement][OCA] (OCA) and
+you will need to have signed the [Oracle Contributor Agreement][OCA] (OCA) and
 your commits need to include the following line using the name and e-mail
 address you used to sign the OCA:
 
@@ -35,14 +35,14 @@ can be accepted.
 
 1. Ensure there is an issue created to track and discuss the fix or enhancement
    you intend to submit.
-1. Fork this repository
+1. Fork this repository.
 1. Create a branch in your fork to implement the changes. We recommend using
-   the issue number as part of your branch name, e.g. `1234-fixes`
+   the issue number as part of your branch name, e.g. `1234-fixes`.
 1. Ensure that any documentation is updated with the changes that are required
    by your change.
 1. Ensure that any samples are updated if the base image has been changed.
 1. Submit the pull request. *Do not leave the pull request blank*. Explain exactly
-   what your changes are meant to do and provide simple steps on how to validate
+   what your changes are meant to do and provide simple steps on how to validate.
    your changes. Ensure that you reference the issue you created as well.
 1. We will assign the pull request to 2-3 people for review before it is merged.
 
@@ -51,5 +51,5 @@ can be accepted.
 Follow the [Golden Rule](https://en.wikipedia.org/wiki/Golden_Rule). If you'd
 like more specific guidelines, see the [Contributor Covenant Code of Conduct][COC].
 
-[OCA]: https://www.oracle.com/technetwork/community/oca-486395.html
+[OCA]: https://oca.opensource.oracle.com
 [COC]: https://www.contributor-covenant.org/version/1/4/code-of-conduct/