fix: news thumbnails and 404s

Signed-off-by: Rishi Raj <rishiraj438gt@gmail.com>

Author: rishiraj38

src/assets/images/meshery/full-logo/meshery-logo-light-text-side.png

@@ -4,9 +4,8 @@ subtitle: ""
 date: 2019-11-15 12:15:05 +0000
 author: The Newsroom
 category: "Press Release"
-thumbnail_svg: ./cncf-stacked-color.svg
-description: "Layer5 officially becomes a member of the Cloud Native Computing Foundation (CNCF). Since its inception, Layer5 has actively contributed to and supported CNCF initiatives and projects."
-darkthumbnail_svg: ./cncf-stacked-color.svg
+thumbnail: ./cncf-stacked-color.png
+darkthumbnail: ./cncf-stacked-color.png
 published: true
 redirect_from:
  - /news/layer5-joins-the-cncf/

src/collections/news/2019/2019-11-15-layer5-joins-the-cncf/cncf-stacked-color.png

@@ -4,8 +4,8 @@ subtitle: ""
 date: 2019-11-23 12:15:05 +0000
 author: Enterprise Networking Planet
 category: Coverage
-thumbnail_svg: ./KubeCon_NA_2019_bg-01.svg
-darkthumbnail_svg: ./KubeCon_NA_2019_bg-01.svg
+thumbnail: ./KubeCon_NA_2019_bg-01.png
+darkthumbnail: ./KubeCon_NA_2019_bg-01.png
 eurl: ""
 description: "At KubeCon NA 2019, Lee Calcote and Matt Klein introduced the CNCF's latest Special Interest Group (SIG) for cloud-native networking. The SIG focuses on advancing cloud-native networking solutions"
 published: true

src/collections/news/2019/2019-11-15-layer5-joins-the-cncf/index.mdx

@@ -4,8 +4,8 @@ subtitle: "A story about growing together as a community and building a project
 date: 2020-06-01 12:15:05 +0000
 author: The Newsroom
 category: Press Release
-thumbnail_svg: ./cncf-landscape-horizontal-color.svg
-darkthumbnail_svg: ./cncf-landscape-horizontal-color.svg
+thumbnail: ./cncf-landscape-horizontal-color.png
+darkthumbnail: ./cncf-landscape-horizontal-color.png
 eurl: https://landscape.cncf.io/card-mode?category=service-mesh&grouping=category&selected=meshery
 source_url: https://landscape.cncf.io/card-mode?category=service-mesh&grouping=category&selected=meshery
 published: true

src/collections/news/2019/2019-11-23-cncf-sig-network-intro-and-deep-dive/KubeCon_NA_2019_bg-01.png

@@ -4,8 +4,8 @@ subtitle: ""
 date: 2021-07-24 04:00:05 +0000
 author: The New Stack
 category: Coverage
-thumbnail_svg: ./The-New-Stack-Logo.svg
-darkthumbnail_svg: ./The-New-Stack-Logo.svg
+thumbnail: ./The-New-Stack-Logo.png
+darkthumbnail: ./The-New-Stack-Logo.png
 description: "CNCF projects Meshery, SMP, and SMI offer distinct approaches to service mesh technology. Meshery emphasizes individual service mesh strengths, SMP provides in-depth performance insights, and SMI defines broad characteristics"
 eurl: https://thenewstack.io/cncf-projects-bring-service-mesh-interoperability-benchmarks/
 source_url: https://thenewstack.io/cncf-projects-bring-service-mesh-interoperability-benchmarks/

src/collections/news/2019/2019-11-23-cncf-sig-network-intro-and-deep-dive/index.mdx

@@ -4,8 +4,8 @@ subtitle: "Standards-based and extensible service mesh management"
 date: 2021-10-13 00:00:05 +0000
 author: The Newsroom
 category: "Press Release"
-thumbnail_svg: "../../../../assets/images/meshery/full-logo/meshery-logo-light-text-side.svg"
-darkthumbnail_svg: "../../../../assets/images/meshery/full-logo/meshery-logo-light-text-side.svg"
+thumbnail: "../../../../assets/images/meshery/full-logo/meshery-logo-light-text-side.png"
+darkthumbnail: "../../../../assets/images/meshery/full-logo/meshery-logo-light-text-side.png"
 presskit: "/press/kits/CNCF-Adopts-Meshery-press-kit.zip"
 description: "Standards-based and extensible service mesh management"
 # eurl: https://docs.google.com/document/d/1L_h0Rzg_6Wv8CnGBUNEfmgVzp-Yd8Cdu0h_C9zipgc8/edit