clang-format: Increase column limit to 100

As discussed in IRC.
This matches the values in TEMPLATE.SOURCECODE.HEADER

Change-Id: I7e7bf5df0b011a54c8dddde5366e73e14068ef7d
Reviewed-on: https://gerrit.libreoffice.org/44249Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>

.clang-format

@@ -11,7 +11,7 @@ BreakBeforeBinaryOperators: true
 BreakBeforeTernaryOperators: true
 BreakConstructorInitializersBeforeComma: true
 BinPackParameters: true
-ColumnLimit:     80
+ColumnLimit:     100
 ConstructorInitializerAllOnOneLineOrOnePerLine: false
 DerivePointerBinding: false
 ExperimentalAutoDetectBinPacking: false