Readme and dependency version updates for stable Identity release (#3386)

* Readme and dependency version updates for stable Identity release

* Lowest possible version I can get through our CI at the moment

Co-authored-by: Anton Kolesnyk <antkmsft@users.noreply.github.com>

sdk/identity/azure-identity/CHANGELOG.md

@@ -1,14 +1,8 @@
 # Release History
 
-## 1.2.0-beta.2 (Unreleased)
+## 1.2.0 (Unreleased)
 
-### Features Added
-
-### Breaking Changes
-
-### Bugs Fixed
-
-### Other Changes
+No changes since `1.2.0-beta.1`.
 
 ## 1.2.0-beta.1 (2022-02-08)
 

sdk/identity/azure-identity/vcpkg/Config.cmake.in

@@ -4,7 +4,7 @@
 @PACKAGE_INIT@
 
 include(CMakeFindDependencyMacro)
-find_dependency(azure-core-cpp "1.4.0-beta.1")
+find_dependency(azure-core-cpp "1.4.0")
 
 include("${CMAKE_CURRENT_LIST_DIR}/azure-identity-cppTargets.cmake")
 

sdk/identity/azure-identity/vcpkg/vcpkg.json

@@ -14,7 +14,7 @@
     {
       "name": "azure-core-cpp",
       "default-features": false,
-      "version>=": "1.4.0-beta.1"
+      "version>=": "1.4.0"
     },
     {
       "name": "vcpkg-cmake",