branch-update-repo: add missing colon to catch the variable imgpath

Without this colon, the variable imgpath is not updated during branching.

Signed-off-by: Dylan Aïssi <dylan.aissi@collabora.com>

release-scripts/branch-update-repo

@@ -179,7 +179,7 @@ update-repo-test-cases(){
         sed -i "s/release: .*/release: ${NEXT_RELEASE}/" .gitlab-ci.yml
         sed -i "s/image_path: .*/image_path: weekly\/${NEXT_RELEASE}/" .gitlab-ci.yml
         sed -i "s/release_version: .*/release_version: ${NEXT_RELEASE}/" lava/*.yaml
-        sed -i "s/imgpath .*/imgpath: daily\/${NEXT_RELEASE}/" lava/*.yaml
+        sed -i "s/imgpath: .*/imgpath: daily\/${NEXT_RELEASE}/" lava/*.yaml
         sed -i "s/branch: .*/branch: ${OSNAME}\/${NEXT_RELEASE}/" test-cases/*.yaml lava/*.yaml
         git commit -s -m "Bump to ${NEXT_RELEASE}" test-cases/*.yaml lava/*.yaml .gitlab-ci.yml
     fi