Build(deps): Bump github.com/lcomrade/highlight in /v2

Bumps [github.com/lcomrade/highlight](https://github.com/lcomrade/highlight) from 1.0.3 to 1.0.4.
- [Release notes](https://github.com/lcomrade/highlight/releases)
- [Changelog](https://github.com/lcomrade/highlight/blob/main/CHANGELOG.md)
- [Commits](https://github.com/lcomrade/highlight/compare/v1.0.3...v1.0.4)

---
updated-dependencies:
- dependency-name: github.com/lcomrade/highlight
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

v2/go.mod

@@ -2,4 +2,4 @@ module github.com/lcomrade/md2html/v2
 
 go 1.11
 
-require github.com/lcomrade/highlight v1.0.3
+require github.com/lcomrade/highlight v1.0.4

v2/go.sum

@@ -1,2 +1,2 @@
-github.com/lcomrade/highlight v1.0.3 h1:TPJHiRselCYWl/3DnXfahmOIdpSwiXAz3dJKeiRZWso=
-github.com/lcomrade/highlight v1.0.3/go.mod h1:J6QdV+WeR7DF5i2AVx03BsQziTLz7lSjbxlm5TAOuzQ=
+github.com/lcomrade/highlight v1.0.4 h1:lXf2DSpWP/FcafbcBk7lXBhH7mPR0esCHj+QKjBcl64=
+github.com/lcomrade/highlight v1.0.4/go.mod h1:J6QdV+WeR7DF5i2AVx03BsQziTLz7lSjbxlm5TAOuzQ=