chore(docs): update PR template

Author: pbrisbin

.github/PULL_REQUEST_TEMPLATE.md

@@ -3,17 +3,13 @@
 * Admin:
   - [ ] No duplicate PRs
 * Integration:
-  - [ ] Update unit tests
-  - [ ] Update shell completions
-  - [ ] Update configuration file
+  - [ ] Always add unit tests for fixes or new functionality
+  - [ ] If adding new options, update `dist/completion/*`
+  - [ ] If adding new options, update `dist/conf/downgrade.conf`
 * Documentation:
-  - [ ] Update usage function
-  - [ ] Update mandoc
-  - [ ] Update readme
-  - [ ] Update locales
-* Release:
-  - [ ] Update change log
-  - [ ] Update `DOWNGRADE_VERSION`
+  - [ ] If adding new options, update usage and `doc/*.ronn`
+  - [ ] If adding new strings, update `locale/*.po`
+  - [ ] If necessary, update `README.md`
 
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