[CrOS Cellular] Fix string translation in "Enter PIN" dialog.

The string in question is "Enter", which appears on the confirmation
button. In this context, "Enter" is used as a verb. However, the
description for this string was unclear and was confused with "Enter",
the name of the key on a keyboard. A translator was confused by the
ambiguous description and chose to use "Enter" exactly as it appeared.

This CL updates the description for clarity.

Bug: 983097
Change-Id: I13fe1a2e97f0b71bf4c6195c40c4728bc2237916
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1714185
Commit-Queue: Kyle Horimoto <khorimoto@chromium.org>
Auto-Submit: Kyle Horimoto <khorimoto@chromium.org>
Reviewed-by: Steven Bennetts <stevenjb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#680177}

chrome/app/settings_strings.grdp

@@ -2185,7 +2185,7 @@
     <message name="IDS_SETTINGS_INTERNET_NETWORK_SIM_BUTTON_CHANGE" desc="Settings > Internet > Network details > Lock/unlock SIM card: Label for dialog button to change a PIN.">
       Change
     </message>
-    <message name="IDS_SETTINGS_INTERNET_NETWORK_SIM_BUTTON_ENTER" desc="Settings > Internet > Network details > Lock/unlock SIM card: Label for dialog button to enter a PIN.">
+    <message name="IDS_SETTINGS_INTERNET_NETWORK_SIM_BUTTON_ENTER" desc="Settings > Internet > Network details > Lock/unlock SIM card: Label for dialog button to enter a PIN; note that in this context, 'Enter' refers to the act of entering a PIN, not the name of a key on the keyboard." meaning="Enter a PIN into the device. [Verb]">
       Enter
     </message>
     <message name="IDS_SETTINGS_INTERNET_NETWORK_SIM_BUTTON_UNLOCK" desc="Settings > Internet > Network details > Lock/unlock SIM card: Label for button to unlock the SIM card.">

chrome/app/settings_strings_grdp/IDS_SETTINGS_INTERNET_NETWORK_SIM_BUTTON_ENTER.png.sha1

+7811c80c12ff964f3e4378fa7871f9b868a7844d
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