Fix Rd issues for CRAN

[kbenoit]

Version: 0.94.4
Check: Rd cross-references
Result: NOTE
Found the following Rd file(s) with Rd \link{} targets missing package
anchors:
as.igraph.Rd: fcm
textplot_network.Rd: fcm, dfm, fcm_select
textplot_wordcloud.Rd: dfm
textplot_xray.Rd: kwic
wordcloud.Rd: dfm
wordcloud_comparison.Rd: dfm
Please provide package anchors for all Rd \link{} targets not in the
package itself and the base packages.
Flavors: r-devel-linux-x86_64-debian-clang, r-devel-linux-x86_64-debian-gcc, r-devel-windows-x86_64

Begin forwarded message:

From: Prof Brian Ripley ripley@stats.ox.ac.uk
Subject: CRAN package quanteda.textplots
Date: 19 July 2024 at 14:27:45 GMT+8
To: kbenoit@lse.ac.uk
Cc: CRAN@R-project.org
Reply-To: CRAN@R-project.org

Dear maintainer,

Please see the problems shown on
https://cran.r-project.org/web/checks/check_results_quanteda.textplots.html.

Please correct before 2024-08-19 to safely retain your package on CRAN.

There is a check service for M1mac issues: see
https://www.stats.ox.ac.uk/pub/bdr/M1mac/README.txt .
However, it is running a much older version of the OS
and toolchain -- and the latter often matters.

The CRAN Team