Change release branch naming in release procedure and script (#1132)

RELEASE_PROCEDURE.md

@@ -4,7 +4,7 @@ DLA-Future follows [Semantic Versioning](https://semver.org).
 
 1. For minor and major releases: check out the `master` branch. All changes required for the release are
    added to `master` via pull requests. For patch releases: check out the corresponding
-   `release-major.minor` branch.
+   `version_major.minor` branch.
 
 1. Write release notes in `CHANGELOG.md`. Check for issues and pull requests for the release on the
    [DLA-F Planning board](https://github.com/orgs/eth-cscs/projects/1). Make sure to include changes that

scripts/roll_release.sh

@@ -29,11 +29,11 @@ if ! which hub >/dev/null 2>&1; then
 fi
 
 # Major and minor releases are made directly from master. Patch releases are branched out from the major
-# and minor releases with a release-X.Y branch.
+# and minor releases with a version_X.Y branch.
 if [[ "${VERSION_PATCH}" -eq 0 ]]; then
     RELEASE_BRANCH="master"
 else
-    RELEASE_BRANCH="release-${VERSION_MAJOR}.${VERSION_MINOR}"
+    RELEASE_BRANCH="version_${VERSION_MAJOR}.${VERSION_MINOR}"
 fi
 
 if ! [[ "$CURRENT_BRANCH" == "$RELEASE_BRANCH" ]]; then