chore: bump version to 2.1.1 for release (#333)

## Description

### Why is this change being made?

1. Preparing for the 2.1.1 release to Maven Central.


### What is changing?

1. Bump project version from 2.1.0 to 2.1.1 in pom.xml.


### Related Links
- **Issue #, if available**:

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## Testing

### How was this tested?

1. `mvn clean test install` - all tests pass.

### When testing locally, provide testing artifact(s):

1. `Tests run: 147, Failures: 0, Errors: 0, Skipped: 0 — BUILD SUCCESS`

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## Reviewee Checklist

**Update the checklist after submitting the PR**

- [x] I have reviewed, tested and understand all changes
  *If not, why:*
- [x] I have filled out the Description and Testing sections above
  *If not, why:*
- [x] Build and Unit tests are passing
  *If not, why:*
- [x] Unit test coverage check is passing
  *If not, why:*
- [x] I have ensured no sensitive information is leaking (i.e., no
logging of sensitive fields, or otherwise)
  *If not, why:*
- [] I have added explanatory comments for complex logic, new
classes/methods and new tests
  *If not, why:*
- [ ] I have updated README/documentation (if needed)
  *If not, why:*
- [ ] I have clearly called out breaking changes (if any)
  *If not, why:*

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## Reviewer Checklist

**All reviewers please ensure the following are true before reviewing:**

- Reviewee checklist has been accurately filled out
- Code changes align with stated purpose in description
- Test coverage adequately validates the changes

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By submitting this pull request, I confirm that my contribution is made
under the terms of the Apache 2.0 license.

Co-authored-by: Vedant Jaiswal <vedjasy@amazon.com>

Author: vedant-jaiswal

pom.xml

@@ -16,7 +16,7 @@
   <artifactId>aws-secretsmanager-jdbc</artifactId>
   <packaging>jar</packaging>
   <name>AWS Secrets Manager SQL Connection Library</name>
-  <version>2.1.0</version>
+  <version>2.1.1</version>
   <description>The AWS Secrets Manager SQL Connection Library for Java enables Java developers to easily
     connect to SQL databases using secrets stored in AWS Secrets Manager.
   </description>