Fix isort version output in the workflow (cvat-ai#5436)

`isort --version` prints a large banner, which, after shell processing,
is collapsed into one line, and the result is an unreadable mess. Use
`--version-number` instead, which prints just the number.

.github/workflows/isort.yml

@@ -62,7 +62,7 @@ jobs:
             pip install $(egrep "isort.*" ./cvat-cli/requirements/development.txt)
             mkdir -p isort_report
 
-            echo "isort version: "$(isort --version)
+            echo "isort version: $(isort --version-number)"
             echo "The dirs will be checked: $UPDATED_DIRS"
             EXIT_CODE=0
             for DIR in $UPDATED_DIRS; do