Added missing changes to 7.1.1 Preview Release changelog

[ulvii]

#832

[carstenartur]

definitly better this way imho, regarding the streaming capability for unicode I missunderstood it - but this can be just me:)

[codecov-io]

Codecov Report

Merging #835 into dev will decrease coverage by 0.08%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##                dev     #835      +/-   ##
============================================
- Coverage     48.37%   48.29%   -0.09%     
+ Complexity     2785     2781       -4     
============================================
  Files           116      116              
  Lines         27877    27877              
  Branches       4651     4651              
============================================
- Hits          13485    13462      -23     
- Misses        12178    12200      +22     
- Partials       2214     2215       +1

Flag	Coverage Δ	Complexity Δ
#JDBC42	47.8% <ø> (-0.1%)	2740 <ø> (-3)
#JDBC43	48.23% <ø> (-0.06%)	2779 <ø> (-2)

Impacted Files	Coverage Δ	Complexity Δ
...rc/main/java/com/microsoft/sqlserver/jdbc/DDC.java	44.2% <0%> (-1.1%)	106% <0%> (-1%)
...ncurrentlinkedhashmap/ConcurrentLinkedHashMap.java	38.14% <0%> (-0.87%)	42% <0%> (-1%)
...rc/main/java/com/microsoft/sqlserver/jdbc/dtv.java	61.99% <0%> (-0.47%)	0% <0%> (ø)
...m/microsoft/sqlserver/jdbc/SQLServerResultSet.java	32.77% <0%> (-0.35%)	256% <0%> (-2%)
...om/microsoft/sqlserver/jdbc/SQLServerBulkCopy.java	52.34% <0%> (-0.13%)	261% <0%> (-1%)
...in/java/com/microsoft/sqlserver/jdbc/IOBuffer.java	54.55% <0%> (ø)	0% <0%> (ø)	⬇️
...c/main/java/com/microsoft/sqlserver/jdbc/Util.java	61.42% <0%> (+0.43%)	90% <0%> (+1%)	⬆️
...om/microsoft/sqlserver/jdbc/ReaderInputStream.java	47.25% <0%> (+3.29%)	15% <0%> (ø)	⬇️

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