Bump orcharhino version to 7.6 (#4545)

orcharhino 7.4 is based on Foreman 3.16 and runs on EL9.

Refs https://orcharhino.com/ressourcen/release-notes/orcharhino-7-6/

Author: quba42

.github/PULL_REQUEST_TEMPLATE.md

@@ -12,9 +12,9 @@
 Please cherry-pick my commits into:
 
 * [ ] Foreman 3.17/Katello 4.19
-* [ ] Foreman 3.16/Katello 4.18 (Satellite 6.18)
+* [ ] Foreman 3.16/Katello 4.18 (Satellite 6.18; orcharhino 7.6)
 * [ ] Foreman 3.15/Katello 4.17
-* [ ] Foreman 3.14/Katello 4.16 (Satellite 6.17; orcharhino 7.4)
+* [ ] Foreman 3.14/Katello 4.16 (Satellite 6.17; orcharhino 7.4; orcharhino 7.5)
 * [ ] Foreman 3.13/Katello 4.15 (EL9 only)
 * [ ] Foreman 3.12/Katello 4.14 (Satellite 6.16; orcharhino 7.2 on EL9 only; orcharhino 7.3)
 * We do not accept PRs for Foreman older than 3.12.

guides/common/attributes-orcharhino.adoc

@@ -1,8 +1,8 @@
 // Overrides for orcharhino build
 :BaseURL: https://docs.orcharhino.com/
-:ProjectVersion: 7.4
-:ProjectVersionPrevious: 7.3
-:ProjectVersionPrevious-Previous: 7.2
+:ProjectVersion: 7.6
+:ProjectVersionPrevious: 7.5
+:ProjectVersionPrevious-Previous: 7.4
 :Project: orcharhino
 :project-allcaps: ORCHARHINO
 :project-context: {Project}