docs: update README

Author: mrexox

Diff for: README.md

@@ -6,14 +6,14 @@ This homebrew tap provides the following package:
 
 ## Installation
 
-```
+```bash
 brew tap coverallsapp/coveralls
 brew install coveralls
 ```
 
 Or
 
-```
+```bash
 brew install coverallsapp/coveralls/coveralls
 ```
 
@@ -23,15 +23,30 @@ brew install coverallsapp/coveralls/coveralls
 
 2. Fetch SHA265 using this command:
 
-```
+```bash
 brew fetch --build-from-source coveralls
 ```
 
 3. Update the SHA256 in formula.
 
 4. Install locally (check there're no errors)
 
-```
+```bash
 brew install --build-from-source coveralls
 ```
 
+5. Create a separate branch
+
+```bash
+git checkout -b coveralls/update-version
+```
+
+6. Commit
+
+```bash
+git commit -m 'coveralls X.Y.Z'
+```
+
+7. Create a PR to `main` branch
+
+8. After bottles are built, add `pr-pull` label to the PR