CHANGELOG.md in rotp-6.2.0 vs CHANGELOG.md in rotp-6.2.1

@@ -1,7 +1,13 @@
 ### Changelog
 
+### 6.2.1
+
+- Removed old rdoc folder that was triggering a security warning due to an
+  old version of JQuery being included in the HTML docs. This has no impact
+  on the Ruby library.
+
 ### 6.2.0
 
 - Update to expand compatibility with Ruby 3. This was only a change to the
   gemspec, no code changes were necessary.
 
@@ -47,9 +53,14 @@
 
 #### 4.0.0
 
 - Simplify API
 - Remove support for Ruby < 2.0
+- BREAKING CHANGE: Removed optional second argument (`padding`) from:
+  - `HOTP#at`
+  - `OTP#generate_otp`
+  - `TOTP#at`
+  - `TOTP#now` (first argument)
 
 #### 3.3.1
 
 - Add OpenSSL as a requirement for Ruby 2.5. Fixes #70 & #64
 - Allow Base32 with padding. #71