Allow support for pinecone-plugin-inference >=2.0.0, <4.0.0 (#419)

## Problem
We're planning on bumping the inference plugin to a new major version,
and we need to loosen the requirements with a version range to support
installing the new plugin.

## Solution
Loosen version requirements on pinecone-plugin-inference to allow up to
but not including version 4.0.0: `pinecone-plugin-inference = ">=2.0.0,
<4.0.0"`


## Type of Change
- [ ] Bug fix (non-breaking change which fixes an issue)
- [X] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to not work as expected)
- [ ] This change requires a documentation update
- [ ] Infrastructure change (CI configs, etc)
- [ ] Non-code change (docs, etc)
- [ ] None of the above: (explain here)

## Test Plan
n/a

pyproject.toml

@@ -52,7 +52,7 @@ lz4 = { version = ">=3.1.3", optional = true }
 protobuf = { version = "^4.25", optional = true }
 protoc-gen-openapiv2 = {version = "^0.0.1", optional = true }
 pinecone-plugin-interface = "^0.0.7"
-pinecone-plugin-inference = "^2.0.0"
+pinecone-plugin-inference = ">=2.0.0, <4.0.0"
 python-dateutil = ">=2.5.3"
 
 [tool.poetry.group.types]