Fix the "Specifying multiple Python/PyPy versions" link (actions#782)

The link was broken due to inconsistency between a table of content and
an actual title of a corresponding section of the Advanced Usage guide.

Author: Jamim

docs/advanced-usage.md

@@ -2,7 +2,7 @@
 - [Using the python-version input](advanced-usage.md#using-the-python-version-input)
     - [Specifying a Python version](advanced-usage.md#specifying-a-python-version)
     - [Specifying a PyPy version](advanced-usage.md#specifying-a-pypy-version)
-    - [Specifying multiple Python and PyPy versions](advanced-usage.md#specifying-multiple-python/pypy-version)
+    - [Specifying multiple Python/PyPy versions](advanced-usage.md#specifying-multiple-pythonpypy-versions)
     - [Matrix Testing](advanced-usage.md#matrix-testing)
 - [Using the python-version-file input](advanced-usage.md#using-the-python-version-file-input)
 - [Check latest version](advanced-usage.md#check-latest-version)
@@ -146,7 +146,7 @@ jobs:
 ```
 More details on PyPy syntax can be found in the [Available versions of PyPy](#pypy) section.
 
-### Specifying multiple Python/PyPy version
+### Specifying multiple Python/PyPy versions
 The python-version input can get multiple python/pypy versions. The last specified version will be used as a default one. 
 
 Download and set up multiple Python versions:

jest.config.js

@@ -33,7 +33,10 @@
     "@actions/io": "^1.0.2",
     "@actions/tool-cache": "^2.0.1",
     "@iarna/toml": "^2.2.5",
-    "semver": "^7.5.2"
+    "axios": "1.12.2",
+    "semver": "^7.5.2",
+    "socket.io": "4.8.1",
+    "socket.io-client": "4.8.1"
   },
   "devDependencies": {
     "@types/jest": "^29.5.6",