fix: correct deno-version default and valid values

Change default from invalid "stable" to valid "2.x" to match setup-deno@v2 requirements.

Changes:
- Update action.yml: default "stable" → "2.x"
- Update README.md: fix all examples using "stable"
- Update test.yml: fix version matrix
- Remove invalid "rc" from documentation

The "stable" keyword is not a valid value in setup-deno@v2.
Valid values are semver ranges (e.g., "2.x", "2.0.0"), "canary", "lts", or Git hashes.

Author: lambdalisue

.github/workflows/test.yml

@@ -44,7 +44,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        deno-version: [stable, lts]
+        deno-version: ["2.x", lts]
         probitas-version: [latest]
     steps:
       - uses: actions/checkout@v4

README.md

@@ -31,7 +31,7 @@ jobs:
 
       - uses: jsr-probitas/setup-probitas@v1
         with:
-          deno-version: stable
+          deno-version: 2.x
           probitas-version: latest
           cache: true
 
@@ -43,7 +43,7 @@ jobs:
 
 | Input | Description | Default |
 |-------|-------------|---------|
-| `deno-version` | The Deno version to install. Can be a semver version, `stable`, `lts`, `rc`, or `canary`. | `stable` |
+| `deno-version` | The Deno version to install. Can be a semver version (e.g., `2.0.0`, `2.x`), `canary`, `lts`, or a Git hash. | `2.x` |
 | `probitas-version` | The Probitas version to install from JSR. Can be a semver version or `latest`. | `latest` |
 | `cache` | Cache downloaded modules & packages automatically in GitHub Actions cache. | `true` |
 | `cache-hash` | A hash used as part of the cache key, which defaults to a hash of the deno.lock files. | - |
@@ -101,7 +101,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        deno-version: [stable, lts, "2.0.0"]
+        deno-version: ["2.x", lts, "2.0.0"]
     steps:
       - uses: actions/checkout@v4
 

action.yml

@@ -7,8 +7,8 @@ branding:
 
 inputs:
   deno-version:
-    description: "The Deno version to install. Can be a semver version, 'canary', 'lts', 'rc', or 'stable'."
-    default: "stable"
+    description: "The Deno version to install. Can be a semver version, 'canary', 'lts', or a Git hash."
+    default: "2.x"
   probitas-version:
     description: "The Probitas version to install. Can be a semver version or 'latest'."
     default: "latest"