feat(deps): bump github.com/alecthomas/chroma/v2 from 2.20.0 to 2.21.0

Bumps [github.com/alecthomas/chroma/v2](https://github.com/alecthomas/chroma) from 2.20.0 to 2.21.0.
- [Release notes](https://github.com/alecthomas/chroma/releases)
- [Commits](alecthomas/chroma@v2.20.0...v2.21.0)

---
updated-dependencies:
- dependency-name: github.com/alecthomas/chroma/v2
  dependency-version: 2.21.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

go.mod

@@ -3,7 +3,7 @@ module github.com/aorith/varnishlog-parser
 go 1.25.3
 
 require (
-	github.com/alecthomas/chroma/v2 v2.20.0
+	github.com/alecthomas/chroma/v2 v2.21.0
 	github.com/aorith/svg-sequence v0.0.15
 	github.com/aorith/svg-timeline v0.2.1
 )

go.sum

@@ -1,9 +1,9 @@
 github.com/alecthomas/assert/v2 v2.11.0 h1:2Q9r3ki8+JYXvGsDyBXwH3LcJ+WK5D0gc5E8vS6K3D0=
 github.com/alecthomas/assert/v2 v2.11.0/go.mod h1:Bze95FyfUr7x34QZrjL+XP+0qgp/zg8yS+TtBj1WA3k=
-github.com/alecthomas/chroma/v2 v2.20.0 h1:sfIHpxPyR07/Oylvmcai3X/exDlE8+FA820NTz+9sGw=
-github.com/alecthomas/chroma/v2 v2.20.0/go.mod h1:e7tViK0xh/Nf4BYHl00ycY6rV7b8iXBksI9E359yNmA=
-github.com/alecthomas/repr v0.5.1 h1:E3G4t2QbHTSNpPKBgMTln5KLkZHLOcU7r37J4pXBuIg=
-github.com/alecthomas/repr v0.5.1/go.mod h1:Fr0507jx4eOXV7AlPV6AVZLYrLIuIeSOWtW57eE/O/4=
+github.com/alecthomas/chroma/v2 v2.21.0 h1:YVW9qQAFnQm2OFPPFQg6G/TpMxKSsUr/KUPDi/BEqtY=
+github.com/alecthomas/chroma/v2 v2.21.0/go.mod h1:NqVhfBR0lte5Ouh3DcthuUCTUpDC9cxBOfyMbMQPs3o=
+github.com/alecthomas/repr v0.5.2 h1:SU73FTI9D1P5UNtvseffFSGmdNci/O6RsqzeXJtP0Qs=
+github.com/alecthomas/repr v0.5.2/go.mod h1:Fr0507jx4eOXV7AlPV6AVZLYrLIuIeSOWtW57eE/O/4=
 github.com/aorith/svg-sequence v0.0.15 h1:E9kH4/WE9+BiQFmOqP3oCuP6e79Cqg1MygetofqTZTs=
 github.com/aorith/svg-sequence v0.0.15/go.mod h1:8PeIQFIE65/ZgSbPwUvv5lfuaiv80V9x2t4NNRhI2jQ=
 github.com/aorith/svg-timeline v0.2.1 h1:BKog2X8drlpTeIXZXa89OnxVaFr4IUhVA4/9q3BUsHE=