Fix ci (#10)

This pull request includes updates to the GitHub Actions workflows for
CI and release processes. The changes simplify the tagging and cleanup
steps in the CI workflow and remove an unnecessary argument in the
release workflow.

Changes to CI workflow:

*
[`.github/workflows/CI.yml`](diffhunk://#diff-3ab46ee209a127470fce3c2cf106b1a1dbadbb929a4b5b13656a4bc4ce19c0b8L106-R110):
Simplified the Docker image tagging and cleanup steps by removing the
pull request number from the tag.

Changes to release workflow:

*
[`.github/workflows/release.yml`](diffhunk://#diff-87db21a973eed4fef5f32b267aa60fcee5cbdf03c67fafdc2a9b553bb0b15f34L35):
Removed the `workdir` argument from the release job configuration.

Author: shahariaazam

.github/workflows/release.yml

@@ -32,6 +32,5 @@ jobs:
         with:
           version: '~> v2'
           args: release --clean
-          workdir: backend
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}