TT#115002 Replace "μ-Law" with "u-Law" in transcode_PCMU

Replace the special character 'μ' (lowercase Greek Mu) with latin 'u' in
a word ‘u-Law’ inside the label and description of 'transcode_PCMU'
voip_preferences attribute. This is for compatibility with xgettext
programs and the Crowdin platform.

Change-Id: I3ffde8a4cb0a57d36e559d88bb2cd9740bc6dbef

db_scripts/diff/15675.down

@@ -0,0 +1,10 @@
+USE provisioning;
+SET autocommit=0;
+
+UPDATE voip_preferences
+SET
+  label = 'Transcode to G.711 µ-Law',
+  description = 'Always offer the audio codec G.711 µ-Law (PCMU, 8 kHz) to this subscriber or peer.'
+WHERE attribute = 'transcode_PCMU';
+
+COMMIT;

db_scripts/diff/15675.up

@@ -0,0 +1,10 @@
+USE provisioning;
+SET autocommit=0;
+
+UPDATE voip_preferences
+SET
+  label = 'Transcode to G.711 u-Law',
+  description = 'Always offer the audio codec G.711 u-Law (PCMU, 8 kHz) to this subscriber or peer.'
+WHERE attribute = 'transcode_PCMU';
+
+COMMIT;