Release version 3.3.0 (#468)

Proposed changelog:

## What's Changed
* Release version 3.2.0 by @github-actions in
#413
* Azure blob skeleton source connector by @aindriu-aiven in
#414
* Add Offset Manager entry for Azure Blob by @aindriu-aiven in
#421
* Feat: azure-blob - add source record iterator by @aindriu-aiven in
#424
* Fixing tests to remove unexpected prefix that was not intended to be
there by @aindriu-aiven in
#448
* Update configuration validation for Source connectors by
@aindriu-aiven in
#447
* Feat: documentation generation by @Claudenw in
#437
* Document connector design by @Claudenw in
#464
* Multiple dependency upgrades, build updates and test fixes.

**Full Changelog**:
v3.2.0...release-tmp

Author: RyanSkraba

gradle.properties

@@ -1,4 +1,4 @@
-version=3.3.0-SNAPSHOT
+version=3.4.0-SNAPSHOT
 
 sonatypeUsername=<fill>
 sonatypePassword=<fill>