Bump ksp_version from 1.5.10-1.0.0-beta02 to 1.5.21-1.0.0-beta07

Bumps `ksp_version` from 1.5.10-1.0.0-beta02 to 1.5.21-1.0.0-beta07.

Updates `symbol-processing-api` from 1.5.10-1.0.0-beta02 to 1.5.21-1.0.0-beta07
- [Release notes](https://github.com/google/ksp/releases)
- [Commits](google/ksp@1.5.10-1.0.0-beta02...1.5.21-1.0.0-beta07)

Updates `symbol-processing` from 1.5.10-1.0.0-beta02 to 1.5.21-1.0.0-beta07
- [Release notes](https://github.com/google/ksp/releases)
- [Commits](google/ksp@1.5.10-1.0.0-beta02...1.5.21-1.0.0-beta07)

---
updated-dependencies:
- dependency-name: com.google.devtools.ksp:symbol-processing-api
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: com.google.devtools.ksp:symbol-processing
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

ksp/build.gradle

@@ -1,5 +1,5 @@
 buildscript {
-    ext.ksp_version='1.5.10-1.0.0-beta02'
+    ext.ksp_version='1.5.21-1.0.0-beta07'
 }
 
 dependencies {