Readme.md and Template changes for better readability (#842)

Files Changed:
README.md
add_device.yaml
Update bug_report.md

clarity, spelling, grammar and consistency changes.

open to suggestions.

.github/ISSUE_TEMPLATE/add_device.yml

@@ -6,7 +6,7 @@ body:
   - type: markdown
     attributes:
       value: |
-        Thanks for supporting KernelSU !
+        Thanks for supporting KernelSU!
   - type: input
     id: repo-url
     attributes:

.github/ISSUE_TEMPLATE/bug_report.md

@@ -11,13 +11,13 @@ assignees: ''
 A clear and concise description of what the bug is.
 
 **To Reproduce**
-Steps to reproduce the behavior:
+Steps to reproduce the behaviour:
 1. Go to '...'
 2. Click on '....'
 3. Scroll down to '....'
-4. See error
+4. See the error
 
-**Expected behavior**
+**Expected behaviour**
 A clear and concise description of what you expected to happen.
 
 **Screenshots**