bootloaders: Use .git suffix for all projects names

This was missing for U-Boot. Use it everywhere for consistency.

Signed-off-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>

bootloaders.xml

@@ -6,7 +6,7 @@
     <remote name="tf-a" fetch="https://git.trustedfirmware.org/" />
 
     <project name="android/bootloader/build-bootloaders.git" path="build" remote="baylibre" revision="ti-android-15" />
-    <project name="ti-u-boot" path="u-boot" remote="baylibre" revision="integ/ti-u-boot-2024.04" />
+    <project name="ti-u-boot.git" path="u-boot" remote="baylibre" revision="integ/ti-u-boot-2024.04" />
     <project name="TF-A/trusted-firmware-a.git" path="arm-trusted-firmware" remote="tf-a" revision="58b25570c9ef91753b14c2103f45f4be9dddb696" clone-depth="1" />
     <project name="OP-TEE/optee_os.git" path="optee-os" remote="github" revision="refs/tags/4.4.0" />
     <project name="OP-TEE/optee_test.git" path="optee-ta/optee_test" remote="github" revision="refs/tags/4.4.0" />