deb-shlibs(5): use "type" rather than "tag" to be consistent with Debian Policy

man/deb-shlibs.5

@@ -27,14 +27,14 @@ entry per line. Blank lines are \fBnot\fP allowed.  Lines beginning
 with an \fB#\fP character are considered commentary, and are ignored.
 All other lines must have the format
 .IP
-.RI [ tag: ]
+.RI [ type: ]
 .I library
 .I version
 .I dependencies
 .PP
 The \fIlibrary\fP and \fIversion\fP fields are whitespace-delimited,
 but the \fIdependencies\fP field extends to the end of the line.  The
-\fItag\fP field is optional and normally not needed.
+\fItype\fP field is optional and normally not needed.
 .PP
 See the Debian Policy Manual for further details.
 .