ci: Fix builds manifests

Remove `.git` suffix from river repo in `sources` section as the
suffix make the ci only clone the repo. Without the suffix the ci
checkout the correct commit to build river.

We don't need to remove the suffix from others sources as cloning
the repo and checkout the tag version we want is enough.

 .builds/alpine.yml    | 2 +-
 .builds/archlinux.yml | 2 +-
 .builds/freebsd.yml   | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/.builds/alpine.yml b/.builds/alpine.yml
index 0963179a..7faca5d1 100644
--- a/.builds/alpine.yml
+++ b/.builds/alpine.yml
@@ -20,9 +20,9 @@ packages:
   - wget
   - xz
 sources:
+  - https://github.com/riverwm/river
   - https://gitlab.freedesktop.org/wayland/wayland.git
   - https://gitlab.freedesktop.org/wlroots/wlroots.git
-  - https://github.com/riverwm/river.git
 tasks:
   - install_deps: |
       cd wayland
diff --git a/.builds/archlinux.yml b/.builds/archlinux.yml
index 6f62449d..e71ac90c 100644
--- a/.builds/archlinux.yml
+++ b/.builds/archlinux.yml
@@ -17,9 +17,9 @@ packages:
   - wget
   - xz
 sources:
+  - https://github.com/riverwm/river
   - https://gitlab.freedesktop.org/wayland/wayland.git
   - https://gitlab.freedesktop.org/wlroots/wlroots.git
-  - https://github.com/riverwm/river.git
 tasks:
   - install_deps: |
       cd wayland
diff --git a/.builds/freebsd.yml b/.builds/freebsd.yml
index 3f2674df..89b48f57 100644
--- a/.builds/freebsd.yml
+++ b/.builds/freebsd.yml
@@ -21,9 +21,9 @@ packages:
   - scdoc
   - wget
 sources:
+  - https://github.com/riverwm/river
   - https://gitlab.freedesktop.org/wayland/wayland.git
   - https://gitlab.freedesktop.org/wlroots/wlroots.git
-  - https://github.com/riverwm/river.git
 tasks:
   - install_deps: |
       cd wayland