chore(env): update PIPELINE_BACKEND_VERSION

[droplet-bot]

Because

• The version of the pipeline-backend service is not updated in the instill-core repository.

This commit

• updates the PIPELINE_BACKEND_VERSION in the .env file to e1db93c.
• updates the pipelineBackend.image.tag in the helm chart values.yaml file to e1db93c.

Changes in pipeline-backend

• chore: release v0.61.0
• fix(component,document): fix incorrect expected value in the unit test (fix(component,document): fix incorrect expected value in the unit test pipeline-backend#1138)
• fix(data): remove duplicate dot in generated filenames (fix(data): remove duplicate dot in generated filenames pipeline-backend#1136)
• feat(data): add comprehensive AVIF image format support (feat(data): add comprehensive AVIF image format support pipeline-backend#1135)
• fix(service): handle null JSON metadata in pipeline conversion (fix(service): handle null JSON metadata in pipeline conversion pipeline-backend#1134)
• refactor(component,ai.gemini): standardize file api timeout and use native embedding type (refactor(component,ai.gemini): standardize file api timeout and use native embedding type pipeline-backend#1133)
• fix(external): fix Content-Disposition header parsing for filename extraction (fix(external): fix Content-Disposition header parsing for filename extraction pipeline-backend#1132)
• refactor(component,generic,http): move test functions to test files and improve code legibility (refactor(component,generic,http): move test functions to test files and improve code legibility pipeline-backend#1131)
• fix(component,ai,gemini): add operation validation for cache task (fix(component,ai,gemini): add operation validation for cache task pipeline-backend#1130)
• feat(component,ai,gemini): add text embeddings task support (feat(component,ai,gemini): add text embeddings task support pipeline-backend#1129)
• feat(component,ai,gemini): implement automatic format conversion for unsupported media types (feat(component,ai,gemini): implement automatic format conversion for unsupported media types pipeline-backend#1128)
• feat(data): add HEIC/HEIF image support and normalize MIME types (feat(data): add HEIC/HEIF image support and normalize MIME types pipeline-backend#1127)
• refactor(component,ai,gemini): merge usage and usage-metadata fields into single usage field (refactor(component,ai,gemini): merge usage and usage-metadata fields into single usage field pipeline-backend#1126)
• fix(component,ai,gemini): unify InlineData processing and enable images in streaming responses (fix(component,ai,gemini): unify InlineData processing and enable images in streaming responses pipeline-backend#1125)
• fix(compogen): escape curly braces for readme.com compatibility (fix(compogen): escape curly braces for readme.com compatibility pipeline-backend#1124)
• ci(workflows): merge sync-component-docs workflows into single push-t… (ci(workflows): merge sync-component-docs workflows into single push-t… pipeline-backend#1123)
• feat(component,ai,gemini): add image generation support (feat(component,ai,gemini): add image generation support pipeline-backend#1122)