NNS1-3485: updates the copy on the Reporting page (#5997)

# Motivation

Refine the wording for the labels on the Reporting page.

# Changes

- Changed labels
- Added copy for the busy screen.

# Tests

- Not necessary

# Todos

- [ ] Add entry to changelog (if necessary).
Not necessary

frontend/src/lib/i18n/en.json

@@ -189,11 +189,11 @@
     "neurons": "There was an error exporting the neurons. Please try again."
   },
   "reporting": {
-    "neurons_title": "NNS Neurons Portfolio",
-    "neurons_description": "Download a detailed CSV report of your neuron portfolio, which includes the stake, maturity, and neuron account ID for manual tracking and analysis.",
+    "neurons_title": "NNS Neuron Portfolio",
+    "neurons_description": "Download a detailed CSV report of your NNS neuron portfolio, which includes the stake, maturity, and neuron account IDs for manual tracking and analysis.",
     "neurons_download": "Export Neurons Portfolio",
     "transactions_title": "ICP Transactions",
-    "transactions_description": "Download a detailed CSV report of your token transaction history, including both regular token accounts and neurons that will show neuron staking and minting transactions for manual tracking and analysis.",
+    "transactions_description": "Download a detailed CSV report of your ICP transaction history, including both regular token ICP accounts and NNS neurons showing neuron staking and minting transactions for manual tracking and analysis.",
     "transactions_download": "Export Transactions",
     "busy_screen": "Generating report..."
   },