Keyvault June release (#5673)

* Update release date and modify sections in CHANGELOG.md
 This commit updates the release date for versions 4.3.0-beta.2 and 4.5.0-beta.2 in the CHANGELOG.md file from "Unreleased" to "2024-06-11". It also removes the "Features Added", "Breaking Changes", and "Bugs Fixed" sections for these versions. The "Other Changes" section has been updated to reflect the relocation of samples to the `samples` directory, updates to the `README.md` file, and updates to the samples.

* kashdhjlaks

* rewrwe

* Update sdk/keyvault/azure-security-keyvault-keys/CHANGELOG.md

Co-authored-by: Ahson Khan <ahkha@microsoft.com>

---------

Co-authored-by: Ahson Khan <ahkha@microsoft.com>

sdk/keyvault/azure-security-keyvault-certificates/CHANGELOG.md

@@ -1,15 +1,13 @@
 # Release History
 
-## 4.3.0-beta.2 (Unreleased)
-
-### Features Added
-
-### Breaking Changes
-
-### Bugs Fixed
+## 4.3.0-beta.2 (2024-06-11)
 
 ### Other Changes
 
+- Relocated samples to the `samples` directory.
+- Updated the `README.md` file with the latest information.
+- Updated samples. 
+
 ## 4.3.0-beta.1 (2024-04-09)
 
 ### Features Added

sdk/keyvault/azure-security-keyvault-keys/CHANGELOG.md

@@ -1,8 +1,6 @@
 # Release History
 
-## 4.5.0-beta.2 (Unreleased)
-
-### Features Added
+## 4.5.0-beta.2 (2024-06-11)
 
 ### Breaking Changes
 
@@ -10,10 +8,12 @@
 - Deprecated `KeyEncryptionAlgorithm::RSA_AES_KEY_WRAP_256` in favor of `KeyEncryptionAlgorithm::RsaAesKeyWrap256`.
 - Deprecated `KeyEncryptionAlgorithm::RSA_AES_KEY_WRAP_384` in favor of `KeyEncryptionAlgorithm::RsaAesKeyWrap384`.
 
-### Bugs Fixed
-
 ### Other Changes
 
+- Relocated samples to the `samples` directory.
+- Updated the `README.md` file with the latest information.
+- Updated samples. 
+
 ## 4.5.0-beta.1 (2024-04-09)
 
 ### Features Added

sdk/keyvault/azure-security-keyvault-secrets/CHANGELOG.md

@@ -1,15 +1,13 @@
 # Release History
 
-## 4.3.0-beta.2 (Unreleased)
-
-### Features Added
-
-### Breaking Changes
-
-### Bugs Fixed
+## 4.3.0-beta.2 (2024-06-11)
 
 ### Other Changes
 
+- Relocated samples to the `samples` directory.
+- Updated the `README.md` file with the latest information.
+- Updated samples. 
+
 ## 4.3.0-beta.1 (2024-04-09)
 
 ### Features Added