[doc] update state resetting APIs

Author: chaoming0625

docs/tutorial_toolbox/state_resetting.ipynb

@@ -18,7 +18,7 @@
     "Similar to [state saving and loading](./saving_and_loading.ipynb) , state resetting is implemented with two functions:\n",
     "\n",
     "- a local function ``.reset_state()`` which resets all local variables in the current node.\n",
-    "- a global function ``.reset()`` which resets all variables in parent and children nodes."
+    "- a global function ``brainpy.reset_state()`` which resets all variables in parent and children nodes."
    ],
    "metadata": {
     "collapsed": false
@@ -93,7 +93,7 @@
   {
    "cell_type": "markdown",
    "source": [
-    "By calling ``net.reset()``, we can reset all states in this network, including variables in the neurons, synapses, and networks. By using ``net.reset_state()``, we can reset the local variables which are defined in the current network. "
+    "By calling ``brainpy.reset_state(net)``, we can reset all states in this network, including variables in the neurons, synapses, and networks. By using ``net.reset_state()``, we can reset the local variables which are defined in the current network. "
    ],
    "metadata": {
     "collapsed": false
@@ -115,7 +115,7 @@
    ],
    "source": [
     "print('Before reset:', net.N.V.value)\n",
-    "net.reset()\n",
+    "bp.reset_state(net)\n",
     "print('After reset:', net.N.V.value)"
    ],
    "metadata": {
@@ -157,7 +157,7 @@
   {
    "cell_type": "markdown",
    "source": [
-    "There is no change for the ``V`` variable, meaning that the network's ``reset_state()`` can not reset states in the children node. Instead, to reset the whole states of the network, users should use ``reset()`` function. "
+    "There is no change for the ``V`` variable, meaning that the network's ``reset_state()`` can not reset states in the children node. Instead, to reset the whole states of the network, users should use ``brainpy.reset_state()`` function. "
    ],
    "metadata": {
     "collapsed": false

setup.py

@@ -70,7 +70,6 @@
     'Operating System :: OS Independent',
     'Programming Language :: Python',
     'Programming Language :: Python :: 3',
-    'Programming Language :: Python :: 3.8',
     'Programming Language :: Python :: 3.9',
     'Programming Language :: Python :: 3.10',
     'Programming Language :: Python :: 3.11',