chore: update copy for deposit to unknown app (#6298)

### Description

It may be unavoidable that some dapps that we do not know about create
transactions that are parsed as deposits / withdraws etc. The "unknown
dapp" message reads a little bit like an error (and was flagged as such
at bugapalooza,
[context](https://valora-app.slack.com/archives/C04B61SJ6DS/p1733248109384319?thread_ts=1733245811.844689&cid=C04B61SJ6DS))
so this PR updates the copy. Open for other suggestions too.

### Test plan

n/a

### Related issues
n/a

### Backwards compatibility

Y
### Network scalability

If a new NetworkId and/or Network are added in the future, the changes
in this PR will:

- [ ] Continue to work without code changes, OR trigger a compilation
error (guaranteeing we find it when a new network is added)

locales/base/translation.json

@@ -2293,13 +2293,13 @@
     "crossChainSwapTransactionLabel": "Cross-chain",
     "depositTitle": "Deposited",
     "depositSubtitle": "to {{txAppName}} Pool",
-    "depositSubtitle_noTxAppName": "to unknown app",
+    "depositSubtitle_noTxAppName": "to an app",
     "withdrawTitle": "Withdrew",
     "withdrawSubtitle": "from {{txAppName}} Pool",
-    "withdrawSubtitle_noTxAppName": "from unknown app",
+    "withdrawSubtitle_noTxAppName": "from an app",
     "claimRewardTitle": "Collected",
     "claimRewardSubtitle": "from {{txAppName}} Pool",
-    "claimRewardSubtitle_noTxAppName": "from unknown app",
+    "claimRewardSubtitle_noTxAppName": "from an app",
     "allTransactionsShown": "You've reached the end of your transaction history.",
     "fetchErrorRetry": "Try again",
     "error": {
@@ -2311,15 +2311,15 @@
     "descriptionLabel": "Details",
     "depositTitle": "Deposited",
     "depositSubtitle": "Deposited {{tokenSymbol}} to {{txAppName}} Pool",
-    "depositSubtitle_noTxAppName": "Deposited {{tokenSymbol}} to unknown app",
+    "depositSubtitle_noTxAppName": "Deposited {{tokenSymbol}} to an app",
     "depositDetails": "Amount Deposited",
     "withdrawTitle": "Withdrew",
     "withdrawSubtitle": "Withdrew {{tokenSymbol}} from {{txAppName}} Pool",
-    "withdrawSubtitle_noTxAppName": "Withdrew {{tokenSymbol}} from unknown app",
+    "withdrawSubtitle_noTxAppName": "Withdrew {{tokenSymbol}} from an app",
     "withdrawDetails": "Amount Withdrawn",
     "claimRewardTitle": "Collected",
     "claimRewardSubtitle": "Collected {{tokenSymbol}} from {{txAppName}} Pool",
-    "claimRewardSubtitle_noTxAppName": "Collected {{tokenSymbol}} from unknown app",
+    "claimRewardSubtitle_noTxAppName": "Collected {{tokenSymbol}} from an app",
     "claimRewardDetails": "Amount Collected",
     "swap": "Swap",
     "network": "Network",