docs: improve GitHub templates (#472)

Author: Mihai Bojin

.github/ISSUE_TEMPLATE/bug_report.md

@@ -1,29 +1,29 @@
 ---
 name: Bug report
-about: Create a report to help us improve
+about: Create a bug report and help us improve our code!
 title: ''
 labels: ''
 assignees: ''
 
 ---
 
 **Describe the bug**
-A clear and concise description of what the bug is.
+A clear and concise description of the bug.
 
 **To Reproduce**
 Steps to reproduce the behavior:
 1. Run '...'
 2. See error
 
 **Expected behavior**
-A clear and concise description of what you expected to happen.
+Please explain what you expected to happen.
 
 **Screenshots**
-If applicable, add screenshots to help explain your problem.
+If possible, add screenshots to help explain your problem.
 
 **Desktop (please complete the following information):**
  - OS: [e.g. Ubuntu Linux 18.04]
- - Version [e.g. 1.2]
+ - MongoCLI version [e.g. 1.2]
 
 **Additional context**
 Add any other context about the problem here.

.github/ISSUE_TEMPLATE/config.yml

@@ -8,4 +8,4 @@ contact_links:
     about: Support is provided under MongoDB Atlas or Enterprise Advance support plans.
   - name: MongoDB Atlas
     url: https://www.mongodb.com/cloud/atlas
-    about: Learn more about MongoDB Atlas
+    about: Learn more about MongoDB Atlas.

.github/pull_request_template.md

@@ -1,43 +1,44 @@
 <!--
 Thanks for contributing to MongoDB CLI!
 
-Before you submit your pull request, please be sure that you've reviewed our contributing guidelines: https://github.com/mongodb/mongocli/blob/master/CONTRIBUTING.md
+Before you submit your pull request, please review our contribution guidelines:
+https://github.com/mongodb/mongocli/blob/master/CONTRIBUTING.md
 
-Please fill out the information below to help speed the review along, and hopefully
-the merge of your pull request!
+Please fill out the information below to help speed up the review process
+and getting you pull request merged!
 -->
 
 ## Proposed changes
 
 <!-- 
-Describe the big picture of your changes here and communicate why we should accept this pull request. 
+Describe the big picture of your changes here and communicate why we should accept this pull request.
 If it fixes a bug or resolves a feature request, be sure to link to that issue. 
 -->
 
-_Jira ticket:_ 
+_Jira ticket:_ CLOUDP-#
 
 <!--
-What MongoDB CLI issue does this PR address? (for example, #1234), remove this section if none
+What MongoDB CLI issue does this PR address? (for example, #1234), remove this section if none.
 -->
 
 Closes #[issue number]
 
 ## Checklist
 
 <!--
-Put an `x` in the boxes that apply. You can also fill these out after creating the PR. If you're unsure about any of them,
-don't hesitate to ask. We're here to help! This is simply a reminder of what we are going to look for before merging your code.
+Check the boxes that apply. If you're unsure about any of them, don't hesitate to ask!
+We're here to help! This is simply a reminder of what we are going to look for before merging your code.
 -->
 
-- [] I have signed the [MongoDB CLA](https://www.mongodb.com/legal/contributor-agreement)
-- [] I have added tests that prove my fix is effective or that my feature works
-- [] I have added any necessary documentation (if appropriate)
-- [] I have run `make fmt` and formatted my code
+- [ ] I have signed the [MongoDB CLA](https://www.mongodb.com/legal/contributor-agreement)
+- [ ] I have added tests that prove my fix is effective or that my feature works
+- [ ] I have added any necessary documentation (if appropriate)
+- [ ] I have run `make fmt` and formatted my code
 
 ## Further comments
 
 <!--
-If this is a relatively large or complex change, kick off the discussion by explaining why you chose the solution you did and what alternatives you considered, etc...
+If this is a relatively large or complex change, kick off the discussion by explaining why you chose the solution you did and what alternatives you considered, etc.
 
-Alternatively, if this is a very minor, and self-explanitory change, feel free to remove this section.
+Alternatively, if this is a very minor, and self-explanatory change, feel free to remove this section.
 -->