Lock the web-sys version to 0.3.67

[jleibs]

What

When investigating the doc build issues I noticed that 0.3.68 is going to cause a build failure:

  Compiling rust to wasm in /home/jleibs/rerun/target_wasm…
  /home/jleibs/rerun> CARGO_ENCODED_RUSTFLAGS="--cfg=web_sys_unstable_apis" RUSTFLAGS="--cfg=web_sys_unstable_apis" "cargo" "build" "--quiet" "--package" "re_viewer" "--lib" "--target" "wasm32-unknown-unknown" "--target-dir" "/home/jleibs/rerun/target_wasm" "--no-default-features" "--features=analytics"
  error[E0061]: this function takes 1 argument but 3 arguments were supplied
     --> /home/jleibs/.cargo/registry/src/index.crates.io-6f17d22bba15001f/wgpu-0.19.1/src/backend/webgpu.rs:375:22
      |
  375 |     let mut mapped = web_sys::GpuDepthStencilState::new(
      |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  376 |         map_compare_function(desc.depth_compare),
      |         ---------------------------------------- unexpected argument of type `GpuCompareFunction`
  377 |         desc.depth_write_enabled,
      |         ------------------------ unexpected argument of type `bool`
      |
  note: associated function defined here
     --> /home/jleibs/.cargo/registry/src/index.crates.io-6f17d22bba15001f/web-sys-0.3.68/src/features/gen_GpuDepthStencilState.rs:27:12
      |
  27  |     pub fn new(format: GpuTextureFormat) -> Self {
      |            ^^^
  help: remove the extra arguments
      |
  376 -         map_compare_function(desc.depth_compare),
  376 +         map_texture_format(desc.format),
      |

  error[E0061]: this function takes 1 argument but 2 arguments were supplied
      --> /home/jleibs/.cargo/registry/src/index.crates.io-6f17d22bba15001f/wgpu-0.19.1/src/backend/webgpu.rs:1693:13
       |
  1693 |             web_sys::GpuVertexState::new(desc.vertex.entry_point, &module.0);
       |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ -------------------------
       |                                          |
       |                                          unexpected argument of type `&str`
       |                                          help: remove the extra argument
       |
  note: associated function defined here
      --> /home/jleibs/.cargo/registry/src/index.crates.io-6f17d22bba15001f/web-sys-0.3.68/src/features/gen_GpuVertexState.rs:27:12
       |
  27   |     pub fn new(module: &GpuShaderModule) -> Self {
       |            ^^^

  error[E0061]: this function takes 2 arguments but 3 arguments were supplied
      --> /home/jleibs/.cargo/registry/src/index.crates.io-6f17d22bba15001f/wgpu-0.19.1/src/backend/webgpu.rs:1768:17
       |
  1768 |                 web_sys::GpuFragmentState::new(frag.entry_point, &module.0, &targets);
       |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ----------------             -------- unexpected argument of type `&js_sys::Array`
       |                                                |
       |                                                expected `&GpuShaderModule`, found `&str`
       |
       = note: expected reference `&GpuShaderModule`
                  found reference `&str`
  note: associated function defined here
      --> /home/jleibs/.cargo/registry/src/index.crates.io-6f17d22bba15001f/web-sys-0.3.68/src/features/gen_GpuFragmentState.rs:27:12
       |
  27   |     pub fn new(module: &GpuShaderModule, targets: &::wasm_bindgen::JsValue) -> Self {
       |            ^^^
  help: remove the extra argument
       |
  1768 -                 web_sys::GpuFragmentState::new(frag.entry_point, &module.0, &targets);
  1768 +                 web_sys::GpuFragmentState::new(/* &GpuShaderModule */, &module.0);
       |

  error[E0061]: this function takes 1 argument but 2 arguments were supplied
      --> /home/jleibs/.cargo/registry/src/index.crates.io-6f17d22bba15001f/wgpu-0.19.1/src/backend/webgpu.rs:1793:13
       |
  1793 |             web_sys::GpuProgrammableStage::new(desc.entry_point, &shader_module.0);
       |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ------------------
       |                                                |
       |                                                unexpected argument of type `&str`
       |                                                help: remove the extra argument
       |
  note: associated function defined here
      --> /home/jleibs/.cargo/registry/src/index.crates.io-6f17d22bba15001f/web-sys-0.3.68/src/features/gen_GpuProgrammableStage.rs:27:12
       |
  27   |     pub fn new(module: &GpuShaderModule) -> Self {
       |            ^^^

  error[E0599]: no method named `write_timestamp` found for struct `GpuCommandEncoder` in the current scope
      --> /home/jleibs/.cargo/registry/src/index.crates.io-6f17d22bba15001f/wgpu-0.19.1/src/backend/webgpu.rs:2505:14
       |
  2503 | /         encoder_data
  2504 | |             .0
  2505 | |             .write_timestamp(&query_set_data.0, query_index);
       | |             -^^^^^^^^^^^^^^^ method not found in `GpuCommandEncoder`
       | |_____________|
       | 

Checklist

• I have read and agree to Contributor Guide and the Code of Conduct
• I've included a screenshot or gif (if applicable)
• I have tested the web demo (if applicable):
  • Using newly built examples: app.rerun.io
  • Using examples from latest main build: app.rerun.io
  • Using full set of examples from nightly build: app.rerun.io
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• If applicable, add a new check to the release checklist!

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[jleibs]

Note that web-sys was already 0.3.67 in our Cargo.lock file