Update synctools to work around eventStatus=null update problem (#1728)

Update synctools to work around eventStatus=null update problem; add synctools to Dependabot-ignore

Author: rfc2822

.github/dependabot.yml

@@ -27,4 +27,5 @@ updates:
       - dependency-name: "org.jetbrains.kotlin.android"
       - dependency-name: "com.google.devtools.ksp"
       # dependencies without semantic versioning
-      - dependency-name: "com.github.bitfireat:dav4jvm"
+      - dependency-name: "com.github.bitfireat:dav4jvm"
+      - dependency-name: "com.github.bitfireat:synctools"

gradle/libs.versions.toml

@@ -20,7 +20,7 @@ androidx-test-junit = "1.3.0"
 androidx-work = "2.10.4"
 bitfire-cert4android = "41009d48ed"
 bitfire-dav4jvm = "f11523619b"
-bitfire-synctools = "c740cb1608"
+bitfire-synctools = "095f96005b"
 compose-accompanist = "0.37.3"
 compose-bom = "2025.09.00"
 dnsjava = "3.6.3"