GOATS-1257 Fix missing program ID in 'Save to GOATS' payload (#601)

* GOATS-1257 Fix missing program ID in 'Save to GOATS' payload

* Add towncrier entry.

Author: miguelgomezgomez

docs/changes/601.bugfix.rst

@@ -0,0 +1 @@
+Fixed missing program ID in the 'Save to GOATS' payload.

src/goats_tom/static/js/gpp/gpp.js

@@ -217,6 +217,7 @@ class GPPModel {
   async saveNormalObservation(formData) {
     // Append the target ID to the form data.
     formData.append("hiddenGoatsTargetIdInput", this.#targetId);
+    formData.append("hiddenProgramIdInput", this.#activeProgram.id)
     return await this.#normalizeResponse(() =>
       this.#api.post(this.#gppSaveNormalObservationUrl, formData, {}, false),
     );