Bump tecnickcom/tcpdf from 6.4.2 to 6.4.4

Bumps [tecnickcom/tcpdf](https://github.com/tecnickcom/TCPDF) from 6.4.2 to 6.4.4.
- [Release notes](https://github.com/tecnickcom/TCPDF/releases)
- [Changelog](https://github.com/tecnickcom/TCPDF/blob/main/CHANGELOG.TXT)
- [Commits](https://github.com/tecnickcom/TCPDF/compare/6.4.2...6.4.4)

---
updated-dependencies:
- dependency-name: tecnickcom/tcpdf
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

composer.lock

@@ -10781,16 +10781,16 @@
         },
         {
             "name": "tecnickcom/tcpdf",
-            "version": "6.4.2",
+            "version": "6.4.4",
             "source": {
                 "type": "git",
                 "url": "https://github.com/tecnickcom/TCPDF.git",
-                "reference": "172540dcbfdf8dc983bc2fe78feff48ff7ec1c76"
+                "reference": "42cd0f9786af7e5db4fcedaa66f717b0d0032320"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/tecnickcom/TCPDF/zipball/172540dcbfdf8dc983bc2fe78feff48ff7ec1c76",
-                "reference": "172540dcbfdf8dc983bc2fe78feff48ff7ec1c76",
+                "url": "https://api.github.com/repos/tecnickcom/TCPDF/zipball/42cd0f9786af7e5db4fcedaa66f717b0d0032320",
+                "reference": "42cd0f9786af7e5db4fcedaa66f717b0d0032320",
                 "shasum": ""
             },
             "require": {
@@ -10841,7 +10841,7 @@
             ],
             "support": {
                 "issues": "https://github.com/tecnickcom/TCPDF/issues",
-                "source": "https://github.com/tecnickcom/TCPDF/tree/6.4.2"
+                "source": "https://github.com/tecnickcom/TCPDF/tree/6.4.4"
             },
             "funding": [
                 {
@@ -10849,7 +10849,7 @@
                     "type": "custom"
                 }
             ],
-            "time": "2021-07-20T14:43:20+00:00"
+            "time": "2021-12-31T08:39:24+00:00"
         },
         {
             "name": "thecodingmachine/safe",