build(deps): bump icalendar from 6.1.1 to 6.1.3 in /tools/base

Bumps [icalendar](https://github.com/collective/icalendar) from 6.1.1 to 6.1.3.
- [Release notes](https://github.com/collective/icalendar/releases)
- [Changelog](https://github.com/collective/icalendar/blob/main/CHANGES.rst)
- [Commits](collective/icalendar@v6.1.1...v6.1.3)

---
updated-dependencies:
- dependency-name: icalendar
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

tools/base/requirements.txt

@@ -709,9 +709,9 @@ humanfriendly==10.0 \
     --hash=sha256:1697e1a8a8f550fd43c2865cd84542fc175a61dcb779b6fee18cf6b6ccba1477 \
     --hash=sha256:6b0b831ce8f15f7300721aa49829fc4e83921a9a301cc7f606be6686a2288ddc
     # via coloredlogs
-icalendar==6.1.1 \
-    --hash=sha256:2c44355a8f006de5ae73fa3f022a1cbe2a0de6b1607ce8879739eb887c4f3471 \
-    --hash=sha256:accf3a4be9a1f89bad00e0bf14103b02cd9b02dcb9b4258eb717f39d24cf58e9
+icalendar==6.1.3 \
+    --hash=sha256:11eb5d21a1a9e119a6efc0f9e38f2cf1622ef97777cd25fb0dd7074d393a2a8d \
+    --hash=sha256:4aef710ff205925b3947fe69ed00f4e142c6a49b5533fca6cc2fdde5a6f62e66
     # via -r requirements.in
 idna==3.10 \
     --hash=sha256:12f65c9b470abda6dc35cf8e63cc574b1c52b11df2c86030af0ac09b01b13ea9 \