Fix #448, Link to CLA in PR template, Add CLA heading to contributing.md

- Capitalizes A in aggrement, adds "only", removes apostrophe

.github/pull_request_template.md

@@ -1,7 +1,7 @@
 **Checklist (Please check before submitting)**
 
 * [ ] I reviewed the [Contributing Guide](https://github.com/nasa/cFS/blob/main/CONTRIBUTING.md).
-* [ ] I signed and emailed the appropriate Contributor License agreement to [email protected] and copied [email protected].
+* [ ] I signed and emailed the appropriate [Contributor License Agreement](https://github.com/nasa/cFS/blob/main/CONTRIBUTING.md#contributor-license-agreement-cla) to [email protected] and copied [email protected].
 
 **Describe the contribution**
 A clear and concise description of what the contribution is.
@@ -31,4 +31,4 @@ The cFS repository is provided to bundle the cFS Framework.  It is utilized for
 
 **Contributor Info - All information REQUIRED for consideration of pull request**
 Full name and company/organization/center of all contributors ("Personal" if individual work)
- - Note CLA's apply to software contributions.
+ - Note CLAs apply to only software contributions.

CONTRIBUTING.md

@@ -86,9 +86,10 @@ Fix #XYZ, SHORT_DESCRIPTION
 
 LONG_DESCRIPTION (optional)
 ```
-5. Sign and email the appropriate Contributor License agreement down below to [email protected] and copy [email protected].
-    - Corporate Contributor License agreement : https://github.com/nasa/cFS/blob/main/Corp_CLA_GSC-18719-1%20cFS%20Bootes.pdf
-    - Individual Contributor License agreement : https://github.com/nasa/cFS/blob/main/Individual_CLA_GSC-18719-1%20cFS%20Bootes.pdf
+#### Contributor License Agreement (CLA)
+Sign and email the appropriate Contributor License agreement below to [email protected] and copy [email protected]
+* Corporate Contributor License agreement : https://github.com/nasa/cFS/blob/main/Corp_CLA_GSC-18719-1%20cFS%20Bootes.pdf
+* Individual Contributor License agreement : https://github.com/nasa/cFS/blob/main/Individual_CLA_GSC-18719-1%20cFS%20Bootes.pdf
 
 #### Create a Pull Request
 1. For the title, use the title convention `Fix #XYZ, SHORT_DESCRIPTION`.