ci: fixed pr workflow triggering only for specific bases (#765)

Signed-off-by: Tomer Figenblat <tomer@tomfi.info>

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## Description

> Describe what you did and why.

**Related issue (if any):** fixes #issue_number_goes_here

## Checklist

- [x] I have followed this repository's contributing guidelines.
- [x] I will adhere to the project's code of conduct.

## Additional information

> Anything else?

Signed-off-by: Tomer Figenblat <tomer@tomfi.info>

.github/workflows/pr.yml

@@ -3,9 +3,6 @@ name: Pull request build
 
 on:
   pull_request:
-    branches:
-      - 'dev'
-      - 'release/*'
 
 env:
   MAIN_PY_VER: "3.10"