update release guide and prep_release workflow. add missing title.

Author: hcannoodt

.github/workflows/prep_release.yml

@@ -39,11 +39,13 @@ jobs:
       id: get_version
       run: |
         viash_version=$(bin/viash --version | cut -d ' ' -f 2)
+        viash_minor_version=$(echo $viash_version | cut -d. -f1,2)
         echo "Detected Viash version: $viash_version"
+        echo "Detected Viash minor version: $viash_minor_version"
         echo "viash_version=$viash_version" >> "$GITHUB_OUTPUT"
         
         # fetch relevant changelog section
-        changelog_section=$(awk "/# Viash ${viash_version}.*/{flag=1;next}/^# /{flag=0}flag" CHANGELOG.md)
+        changelog_section=$(awk "/# Viash ${viash_version}.*/{flag=1;print;next}/^# /{flag=0}flag" CHANGELOGS/CHANGELOG_${viash_minor_version}.md)
         
         echo "changelog_section<<GITHUB_EOF" >> "$GITHUB_OUTPUT"
         echo "$changelog_section" >> "$GITHUB_OUTPUT"

RELEASE_GUIDE.md

@@ -27,7 +27,7 @@ Head over releases and select the prepared release.
 
 Double check the tag version.
 
-Add the title from the changelog.md into the release notes.
+Add the title from the relevant `CHANGELOGS/CHANGELOG_x.x.md` into the release notes.
 
 Select the necessary prerelease or latest release options and hit the 'publish release' button.
 
@@ -59,7 +59,7 @@ Short summary if you already have an operational envirionment:
 
 Under the `develop` branch,
 - Update the version in `build.sbt` to the next version with a `-dev` suffix.
-- Add a placeholder entry in `CHANGELOG.md` for a future release.
+- Add a placeholder entry in `CHANGELOGS/CHANGELOG_x.x.md` for a future release.
 
 Template: