Preps for 1.8.0-rc2

Update version fields for 1.8.0-rc2 release.

Signed-off-by: David Brown <david.brown@linaro.org>
diff --git a/README.md b/README.md
index 60d6594..44df729 100644
--- a/README.md
+++ b/README.md
@@ -16,7 +16,7 @@
 [travis]: https://travis-ci.org/mcu-tools/mcuboot
 [license]: https://github.com/mcu-tools/mcuboot/blob/main/LICENSE
 
-This is mcuboot version 1.8.0-rc1
+This is mcuboot version 1.8.0-rc2
 
 MCUboot is a secure bootloader for 32-bit MCUs. The goal of MCUboot is to
 define a common infrastructure for the bootloader, system flash layout on
diff --git a/docs/release-notes.md b/docs/release-notes.md
index 60171f0..0b3e01c 100644
--- a/docs/release-notes.md
+++ b/docs/release-notes.md
@@ -26,6 +26,10 @@
 - Allow to boot primary image if secondary one is unreachable.
 - Add AES256 image encryption support.
 - Add Multiimage boot for direct-xip and ram-load mode.
+- Cargo files moved to top level, now `cargo test` can be run from the
+  top level directory.
+- Fault injection tests use updated TF-M.
+- Thingy:53 now supports multi-image DFU.
 
 ### Security fixes
 
diff --git a/repository.yml b/repository.yml
index 2e365ad..daf3d87 100644
--- a/repository.yml
+++ b/repository.yml
@@ -33,7 +33,7 @@
     "1.7.0": "v1.7.0"
     "1.7.1": "v1.7.1"
     "1.7.2": "v1.7.2"
-    "1.8.0": "v1.8.0-rc1"
+    "1.8.0": "v1.8.0-rc2"
 
     "0-dev": "0.0.0"        # main
     "0-latest": "1.7.2"     # latest stable release
diff --git a/scripts/imgtool/__init__.py b/scripts/imgtool/__init__.py
index 42e7cc5..f34144a 100644
--- a/scripts/imgtool/__init__.py
+++ b/scripts/imgtool/__init__.py
@@ -14,4 +14,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-imgtool_version = "1.8.0rc1"
+imgtool_version = "1.8.0rc2"