Update PULL_REQUEST_TEMPLATE.md

Fix usage and rewording.

Signed-off-by: Ashish Billore <12685832+ashish-billore@users.noreply.github.com>

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,15 +1,15 @@
 <!-- Thanks for sending a pull request!
 
 Before you click the 'Create pull request' make sure that:
-- This PR introduces a single feature of fix, just one
+- This PR introduces a single feature or fix, just one!
 - This PR does not leave the main branch broken
-- Every commit in this PR has a commit message explaining what do you change,
+- Every commit in this PR has a commit message explaining what did you change,
   why and what is the outcome
 - If your change introduces a complex concept or a change to user interaction
   with the project or the application, make sure to document it
 
 If you don't comply with these rules, you waste your energy, time of reviewers
-and cause suffering of future generations.
+and cause suffering to future generations.
 -->
 
 **What this PR does / why we need it**: