Improve docs

README.md

@@ -18,7 +18,7 @@ environments to ensure cross-platform builds work correctly.
 ```yaml
 - uses: pulumi/verify-provider-release@v1
   with:
-    # The runtime to test against. One of `nodejs`, `python`, `dotnet`, `go` or `java`.
+    # The runtime to test against. One of `nodejs`, `python`, `dotnet` or `go`.
     runtime: 'nodejs'
     # Path to a Pulumi program to use for the test.
     directory: examples/simple-nodejs
@@ -37,6 +37,21 @@ environments to ensure cross-platform builds work correctly.
     goModuleTemplate: 'github.com/{publisher}/pulumi-{provider}/sdk{moduleVersionSuffix}'
 ```
 
+### Language-Specific Details
+
+#### Python
+
+1. When testing prereleases, you'll need to set the `packageVersion` because it
+   will always be a different format to the provider's version.
+1. The `Pulumi.yaml` runtime must set the `virtualenv` option to `venv`:
+
+   ```yaml
+   runtime:
+     name: python
+     options:
+       virtualenv: venv
+   ```
+
 ## Development Setup
 
 1. :hammer_and_wrench: Install the dependencies

action.yml

@@ -11,8 +11,7 @@ branding:
 inputs:
   runtime:
     description:
-      The runtime to test against. One of `nodejs`, `python`, `dotnet`, `go` or
-      `java`.
+      The runtime to test against. One of `nodejs`, `python`, `dotnet` or `go`.
     required: true
   directory:
     description: Path to a Pulumi program to use for the test.

src/main.ts

@@ -3,7 +3,7 @@ import * as core from '@actions/core'
 import { verifyRelease } from './verifyRelease'
 import { parse } from 'semver'
 
-const supportedRuntimes = ['python', 'nodejs', 'dotnet', 'go', 'java', 'yaml']
+const supportedRuntimes = ['python', 'nodejs', 'dotnet', 'go', 'yaml']
 
 /**
  * The main function for the action.