Add warning about double quotes in BigQuery credentials_json field

Author: JakeSCahill

docs-data/connect-diff-4.77.0_to_4.78.0.json

@@ -2,7 +2,7 @@
   "comparison": {
     "oldVersion": "4.77.0",
     "newVersion": "4.78.0",
-    "timestamp": "2026-01-23T16:09:26.710Z"
+    "timestamp": "2026-01-24T12:07:33.432Z"
   },
   "summary": {
     "newComponents": 0,

docs-data/overrides.json

@@ -3647,7 +3647,7 @@
           },
           {
             "name": "credentials_json",
-            "description": "Sets the https://developers.google.com/workspace/guides/create-credentials#create_credentials_for_a_service_account[Google Service Account Credentials JSON^] (optional).\n\nWARNING: When using xref:configuration:interpolation.adoc#bloblang-queries[interpolation functions] to populate this field, do not wrap the function in double quotes. For example, use `${secrets.GCP_CREDENTIALS_JSON}` instead of `\"${secrets.GCP_CREDENTIALS_JSON}\"`. Double quotes cause JSON parsing errors because the credentials already contain JSON content."
+            "description": "Sets the https://developers.google.com/workspace/guides/create-credentials#create_credentials_for_a_service_account[Google Service Account Credentials JSON^] (optional).\n\nWARNING: When using xref:configuration:interpolation.adoc#bloblang-queries[interpolation functions] to populate this field, wrap the function in single quotes, not double quotes. For example, use `'${secrets.GCP_CREDENTIALS_JSON}'` instead of `\"${secrets.GCP_CREDENTIALS_JSON}\"`. Double quotes cause JSON parsing errors because the credentials already contain JSON content."
           },
           {
             "name": "csv",

modules/components/attachments/connect-4.78.0.json

@@ -28914,7 +28914,7 @@
             "name": "credentials_json",
             "type": "string",
             "kind": "scalar",
-            "description": "Sets the https://developers.google.com/workspace/guides/create-credentials#create_credentials_for_a_service_account[Google Service Account Credentials JSON^] (optional).\n\nWARNING: When using xref:configuration:interpolation.adoc#bloblang-queries[interpolation functions] to populate this field, do not wrap the function in double quotes. For example, use `${secrets.GCP_CREDENTIALS_JSON}` instead of `\"${secrets.GCP_CREDENTIALS_JSON}\"`. Double quotes cause JSON parsing errors because the credentials already contain JSON content.",
+            "description": "Sets the https://developers.google.com/workspace/guides/create-credentials#create_credentials_for_a_service_account[Google Service Account Credentials JSON^] (optional).\n\nWARNING: When using xref:configuration:interpolation.adoc#bloblang-queries[interpolation functions] to populate this field, wrap the function in single quotes, not double quotes. For example, use `'${secrets.GCP_CREDENTIALS_JSON}'` instead of `\"${secrets.GCP_CREDENTIALS_JSON}\"`. Double quotes cause JSON parsing errors because the credentials already contain JSON content.",
             "is_secret": true,
             "default": "",
             "scrubber": "root = if this != null && this != \"\" && !this.trim().re_match(\"\"\"^\\${[0-9A-Za-z_.]+(:((\\${[^}]+})|[^}])*)?}$\"\"\") {\n  \"!!!SECRET_SCRUBBED!!!\"\n} else if this == null { \"\" }"

modules/components/partials/fields/outputs/gcp_bigquery.adoc

@@ -140,7 +140,7 @@ Specifies the circumstances under which a destination table is created.
 
 Sets the https://developers.google.com/workspace/guides/create-credentials#create_credentials_for_a_service_account[Google Service Account Credentials JSON^] (optional).
 
-WARNING: When using xref:configuration:interpolation.adoc#bloblang-queries[interpolation functions] to populate this field, do not wrap the function in double quotes. For example, use `${secrets.GCP_CREDENTIALS_JSON}` instead of `"${secrets.GCP_CREDENTIALS_JSON}"`. Double quotes cause JSON parsing errors because the credentials already contain JSON content.
+WARNING: When using xref:configuration:interpolation.adoc#bloblang-queries[interpolation functions] to populate this field, wrap the function in single quotes, not double quotes. For example, use `'${secrets.GCP_CREDENTIALS_JSON}'` instead of `"${secrets.GCP_CREDENTIALS_JSON}"`. Double quotes cause JSON parsing errors because the credentials already contain JSON content.
 
 include::redpanda-connect:components:partial$secret_warning.adoc[]
 

modules/get-started/pages/whats-new.adoc

@@ -8,6 +8,7 @@ For a full list of product updates, and details of updates prior to version 4.29
 
 
 
+
 == Version 4.78.0
 
 link:https://github.com/redpanda-data/connect/releases/tag/v4.78.0[See the full release notes^].