Increase size of text box on issue submission

When submitting PR's the text field for the Details and Resolution box are too small and will truncate the text that is being submitted.

I'd request that the field size is increased to allow for detailed text when submitting license updates.

Here is a sample text updated I did that was truncated for node:

File with a section of code prefaced by the following notice:

* This implementation of cfmakeraw for Solaris and derivatives is taken from
* http://www.perkin.org.uk/posts/solaris-portability-cfmakeraw.html.

The code following this comment is based on sample code on the cited webpage, as found at http://www.perkin.org.uk/posts/solaris-portability-cfmakeraw.html. The relevant section of sample code at the referenced URL is prefaced by the comment "[o]k, so all it’s doing is setting some additional flags in the tio structure, and a quick search in the NetBSD OpenGrok gives us their implementation," which indicates that NetBSD is the origin of this material, and is thus licensed under the BSD License (see specifically https://nxr.netbsd.org/xref/src/lib/libc/termios/cfmakeraw.c); node v12.4.0 may not be in compliance with the terms of this license.