Fix example analysis typos.

Correct capitalization of "DNAse" to "DNase" in comments and text, and change 21 bp to 6 bp for variant `47212074_7`.

PiperOrigin-RevId: 874697849
Change-Id: I5d1868562b2f1c3fce648ba08964b1a29793a35c

Author: GDM Genomics

colabs/example_analysis_workflow.ipynb

@@ -895,7 +895,7 @@
         "To make predictions, we'll specify the `interval` (resized to an input sequence\n",
         "length of 2^20 = 1,048,576 bp). We'll also pass in our `requested_outputs`\n",
         "field, which indicates to the model to predict three types of outputs: RNA-seq\n",
-        "(a measure of gene expression), DNAse-seq (a measure of DNA accessibility), and\n",
+        "(a measure of gene expression), DNase-seq (a measure of DNA accessibility), and\n",
         "ChIP-Histone (a measure of histone modifications, which can indicate active or\n",
         "repressed chromatin states)."
       ]
@@ -982,7 +982,7 @@
         "            ylabel_template='{biosample_name} ({strand})\\n{name}',\n",
         "            filled=True,\n",
         "        ),\n",
-        "        # DNAse tracks.\n",
+        "        # DNase tracks.\n",
         "        plot_components.Tracks(\n",
         "            tdata=output.alternate.dnase.filter_to_nonpositive_strand()\n",
         "            - output.reference.dnase.filter_to_nonpositive_strand(),\n",
@@ -1000,7 +1000,7 @@
         "    annotations=[plot_components.VariantAnnotation([variant])],\n",
         "    interval=tal1_interval,\n",
         "    title=(\n",
-        "        'Effect of variant on predicted RNA Expression, DNAse, and ChIP-Histone'\n",
+        "        'Effect of variant on predicted RNA Expression, DNase, and ChIP-Histone'\n",
         "        f' in CD34 positive HSC.\\n{variant=}'\n",
         "    ),\n",
         ")"
@@ -1021,7 +1021,7 @@
         "-   RNA-seq coverage is above the horizontal, meaning that *TAL1* is increased\n",
         "    in the presence of the alternate sequence relative to the reference\n",
         "    sequence.\n",
-        "-   DNAse-seq indicate changing accessibility near the site of the variant, and\n",
+        "-   DNase-seq indicate changing accessibility near the site of the variant, and\n",
         "    increased accessibility near the transcription start site of *TAL1*.\n",
         "-   An increase in H3K27ac and H3K4me1 centered directly on the variant's\n",
         "    location, which mark active enhancers.\n",
@@ -1174,7 +1174,7 @@
         "\n",
         "facet_title_by_group = {\n",
         "    '47212072_22': 'chr1:47212072\\n21 bp ins.',\n",
-        "    '47212074_7': 'chr1:47212072\\n21 bp ins.',\n",
+        "    '47212074_7': 'chr1:47212072\\n6 bp ins.',\n",
         "    '47230639_1': 'chr1:47230639\\nSNV',\n",
         "    'MUTE_2': 'chr1:47239296\\n1 bp ins.',\n",
         "    'MUTE_3': 'chr1:47239296\\n2 bp ins.',\n",