chore(deps): bump ph-css from 6.1.1 to 6.3.4 (#11694)

* chore(deps): bump ph-css from 6.1.1 to 6.3.4

Bumps [ph-css](https://github.com/phax/ph-css) from 6.1.1 to 6.3.4.
- [Release notes](https://github.com/phax/ph-css/releases)
- [Commits](phax/ph-css@ph-css-parent-pom-6.1.1...ph-css-parent-pom-6.3.4)

---
updated-dependencies:
- dependency-name: com.helger:ph-css
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

* Remove ph-commons dependency override

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Artem Godin <[email protected]>

flow-server/pom.xml

@@ -130,25 +130,7 @@
         <dependency>
             <groupId>com.helger</groupId>
             <artifactId>ph-css</artifactId>
-            <version>6.1.1</version>
-            <exclusions>
-                <exclusion>
-                    <groupId>com.helger</groupId>
-                    <artifactId>ph-commons</artifactId>
-                </exclusion>
-            </exclusions>
-        </dependency>
-
-        <dependency>
-            <groupId>com.helger</groupId>
-            <artifactId>ph-commons</artifactId>
-            <version>9.1.2</version>
-            <exclusions>
-                <exclusion>
-                    <groupId>com.google.code.findbugs</groupId>
-                    <artifactId>jsr305</artifactId>
-                </exclusion>
-            </exclusions>
+            <version>6.3.4</version>
         </dependency>
 
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