yamllint: indentation: fix files in tests/

Fix the YAML files indentation for files in tests/.

Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>

tests/boot/test_mcuboot/testcase.yaml

@@ -1,14 +1,14 @@
 common:
-    sysbuild: true
-    harness: console
-    harness_config:
-      type: multi_line
-      regex:
-        - "I: Starting bootloader"
-        - "Launching primary slot application on (.*)"
-        - "Secondary application ready for swap, rebooting"
-        - "I: Starting swap using (.*)"
-        - "Swapped application booted on (.*)"
+  sysbuild: true
+  harness: console
+  harness_config:
+    type: multi_line
+    regex:
+      - "I: Starting bootloader"
+      - "Launching primary slot application on (.*)"
+      - "Secondary application ready for swap, rebooting"
+      - "I: Starting swap using (.*)"
+      - "Swapped application booted on (.*)"
 tests:
   boot.mcuboot:
     tags: mcuboot

tests/boot/uefi/testcase.yaml

@@ -1,10 +1,10 @@
 common:
-    platform_allow: qemu_x86_64
-    harness: console
-    harness_config:
-      type: one_line
-      regex:
-        - "Hello World! (.*)"
+  platform_allow: qemu_x86_64
+  harness: console
+  harness_config:
+    type: one_line
+    regex:
+      - "Hello World! (.*)"
 tests:
   boot.uefi:
     tags: uefi