Fix for envcanada Provider to use new Environment Canada weather data access (#3878)

Earlier in 2025, Environment Canada changed the process to access
weather data for Canadian cities. This change was raised in Issue #3822
as a Bug, which is addressed in this Provider update. There are no Magic
Mirror UI changes from this update.

The 'old' method to access Environment Canada involved accessing a
static URL based on a City identifier which would result in an XML
document containing the appropriate weather data.

The 'new' method is a 2 step process. The first step is to access a
time-sensitive URL that contains a list of links to various cities that
have weather data available. The second step requires finding the
correct city in that list based on a City identifier, and then accessing
that unique URL to access an XML document containing the appropriate
weather data.

The changes made to the envcanada Provider code are solely aimed at
using the new 2-step method to access a specified City's weather data.
Since the resulting XML document structure has not changed, no other
code in envcanada required changes.

Note that a ChangeLog entry is included in this PR.

---------

Co-authored-by: Kristjan ESPERANTO <35647502+KristjanESPERANTO@users.noreply.github.com>
Co-authored-by: veeck <gitkraken@veeck.de>

CHANGELOG.md

@@ -59,6 +59,7 @@ Thanks to: @dathbe.
 - [core] Fixed socket.io timeout when server is slow to send notification, notification lost at client (#3380)
 - [tests] refactor AnimateCSS tests after jsdom 27 upgrade (#3891)
 - [weather] Use `apparent_temperature` data from openmeteo's hourly weather for current feelsLikeTemp (#3868).
+- [weather] Updated envcanada Provider to use new database/URL schema for accessing weather data (#3822).
 
 ## [2.32.0] - 2025-07-01