Bump CNG version and update changelog.

Change-Id: Id1d6e8c3209ef274710cb6a881504031a84f8ba6

Author: tdbhacks

CHANGELOG.md

@@ -102,6 +102,13 @@ Initial release of the library.
 
 ## CNG Provider for Cloud KMS
 
+### CNG v1.2
+
+The following changes are included in the v1.2 (May 2025) release:
+
+*   Add support for `RSA_SIGN_PKCS1_2048_SHA256` and
+    `RSA_SIGN_PKCS1_3072_SHA256`.
+
 ### CNG v1.1
 
 The following changes are included in the v1.1 (April 2024) release:

kmscng/version.h

@@ -20,7 +20,7 @@
 namespace cloud_kms::kmscng {
 
 constexpr uint8_t kLibraryVersionMajor = 1;
-constexpr uint8_t kLibraryVersionMinor = 1;
+constexpr uint8_t kLibraryVersionMinor = 2;
 
 // https://learn.microsoft.com/en-us/windows/win32/seccng/key-storage-property-identifiers#ncrypt_version_property
 constexpr uint32_t kLibraryVersionHex =