Merge pull request #1430 from alphagov/southend-on-sea-city

Update Southend-on-Sea City Council name

data/local-authorities.csv

@@ -296,7 +296,7 @@ id,gss,snac,local_custodian_code,tier_id,parent_local_authority_id,slug,country_
 314,S12000028,00RE,9076,3,,south-ayrshire,Scotland,https://www.south-ayrshire.gov.uk/,"South Ayrshire Council"
 316,E07000012,12UG,530,2,56,south-cambridgeshire,England,http://www.scambs.gov.uk/,"South Cambridgeshire District Council"
 317,E07000039,17UK,1040,2,101,south-derbyshire,England,https://www.southderbyshire.gov.uk,"South Derbyshire District Council"
-318,E06000033,00KF,1590,3,,southend-on-sea,England,http://www.southend.gov.uk/,"Southend-on-Sea Borough Council"
+318,E06000033,00KF,1590,3,,southend-on-sea,England,http://www.southend.gov.uk/,"Southend-on-Sea City Council"
 319,E06000025,00HD,119,3,,south-gloucestershire,England,http://www.southglos.gov.uk/,"South Gloucestershire Council"
 320,E07000044,18UG,1125,2,104,south-hams,England,http://www.southhams.gov.uk/,"South Hams District Council"
 321,E07000140,32UF,2525,2,205,south-holland,England,https://www.sholland.gov.uk/,"South Holland District Council"