Bump org.pgpainless:pgpainless-core from 1.7.5 to 1.7.6 (#3019)

Bumps [org.pgpainless:pgpainless-core](https://github.com/pgpainless/pgpainless) from 1.7.5 to 1.7.6.
- [Release notes](https://github.com/pgpainless/pgpainless/releases)
- [Changelog](https://github.com/pgpainless/pgpainless/blob/main/CHANGELOG.md)
- [Commits](pgpainless/pgpainless@1.7.5...1.7.6)

---
updated-dependencies:
- dependency-name: org.pgpainless:pgpainless-core
  dependency-version: 1.7.6
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

FlowCrypt/build.gradle.kts

@@ -487,7 +487,7 @@ dependencies {
   implementation("org.bitbucket.b_c:jose4j:0.9.6")
   implementation("org.jsoup:jsoup:1.19.1")
   implementation("org.jetbrains.kotlinx:kotlinx-coroutines-core:1.10.2")
-  implementation("org.pgpainless:pgpainless-core:1.7.5")
+  implementation("org.pgpainless:pgpainless-core:1.7.6")
   implementation("org.eclipse.angus:angus-mail:2.0.3")
   implementation("org.eclipse.angus:gimap:2.0.3")
   implementation("commons-io:commons-io:2.19.0")