Prepare Flux v2.7.0 release

Signed-off-by: Matheus Pimenta <matheuscscp@gmail.com>

Author: matheuscscp

.github/labels.yaml

@@ -1,6 +1,9 @@
 # Configuration file to declaratively configure labels
 # Ref: https://github.com/EndBug/label-sync#Config-files
 
+- name: backport:v2-7
+  description: To be backported to v2-7
+  color: '#ffd700'
 - name: backport:v2-6
   description: To be backported to v2-6
   color: '#ffd700'

hugo.yaml

@@ -109,12 +109,12 @@ params:
   version_menu_pagelinks: true
   url_latest_version: https://fluxcd.io/flux/
   versions:
-    - version: "v2.6"
+    - version: "v2.7"
       url: https://fluxcd.io
+    - version: "v2.6"
+      url: https://v2-6.docs.fluxcd.io
     - version: "v2.5"
       url: https://v2-5.docs.fluxcd.io
-    - version: "v2.4"
-      url: https://v2-4.docs.fluxcd.io
   logos:
     navbar: flux-horizontal-white.png
     hero: flux-horizontal-color.png